avcodec/dovi_rpuenc: add ff_dovi_rpu_generate()
This function takes a decoded AVDOVIMetadata struct and turns it back into a binary RPU. Verified using existing tools, and matches the bitstream in official reference files. I decided to just roll the EMDF and NAL encapsulation into this function because the end user will need to do it otherwise anyways.
This commit is contained in:
Niklas Haas
parent
f140935005
commit
3306766608
@ -51,20 +51,22 @@ typedef struct DOVIContext {
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AVDOVIDecoderConfigurationRecord cfg;
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/**
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* Currently active RPU data header, updates on every dovi_rpu_parse().
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* Currently active RPU data header, updates on every ff_dovi_rpu_parse()
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* or ff_dovi_rpu_generate().
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*/
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AVDOVIRpuDataHeader header;
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/**
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* Currently active data mappings, or NULL. Points into memory owned by the
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* corresponding rpu/vdr_ref, which becomes invalid on the next call to
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* dovi_rpu_parse.
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* ff_dovi_rpu_parse() or ff_dovi_rpu_generate().
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*/
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const AVDOVIDataMapping *mapping;
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const AVDOVIColorMetadata *color;
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/**
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* Currently active extension blocks, updates on every ff_dovi_rpu_parse()
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* or ff_dovi_rpu_generate().
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*/
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AVDOVIDmData *ext_blocks;
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int num_ext_blocks;
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@ -134,6 +136,20 @@ enum {
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RPU_COEFF_FLOAT = 1,
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};
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/**
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* Synthesize a Dolby Vision RPU reflecting the current state. Note that this
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* assumes all previous calls to `ff_dovi_rpu_generate` have been appropriately
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* signalled, i.e. it will not re-send already transmitted redundant data.
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*
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* Mutates the internal state of DOVIContext to reflect the change.
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* Returns 0 or a negative error code.
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*
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* This generates a fully formed RPU ready for inclusion in the bitstream,
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* including the EMDF header (profile 10) or NAL encapsulation (otherwise).
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*/
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int ff_dovi_rpu_generate(DOVIContext *s, const AVDOVIMetadata *metadata,
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uint8_t **out_rpu, int *out_size);
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/**
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* Internal helper function to guess the correct DV profile for HEVC.
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*
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@ -21,10 +21,15 @@
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*/
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#include "libavutil/avassert.h"
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#include "libavutil/crc.h"
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#include "libavutil/mem.h"
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#include "avcodec.h"
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#include "dovi_rpu.h"
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#include "itut35.h"
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#include "put_bits.h"
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#include "put_golomb.h"
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#include "refstruct.h"
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static struct {
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uint64_t pps; // maximum pixels per second
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@ -201,3 +206,542 @@ skip:
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s->cfg = (AVDOVIDecoderConfigurationRecord) {0};
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return 0;
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}
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static inline void put_ue_coef(PutBitContext *pb, const AVDOVIRpuDataHeader *hdr,
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uint64_t coef)
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{
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union { uint32_t u32; float f32; } fpart;
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switch (hdr->coef_data_type) {
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case RPU_COEFF_FIXED:
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set_ue_golomb(pb, coef >> hdr->coef_log2_denom);
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put_bits64(pb, hdr->coef_log2_denom,
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coef & ((1LL << hdr->coef_log2_denom) - 1));
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break;
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case RPU_COEFF_FLOAT:
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fpart.f32 = coef / (float) (1LL << hdr->coef_log2_denom);
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put_bits64(pb, hdr->coef_log2_denom, fpart.u32);
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break;
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}
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}
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static inline void put_se_coef(PutBitContext *pb, const AVDOVIRpuDataHeader *hdr,
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uint64_t coef)
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{
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union { uint32_t u32; float f32; } fpart;
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switch (hdr->coef_data_type) {
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case RPU_COEFF_FIXED:
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set_se_golomb(pb, coef >> hdr->coef_log2_denom);
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put_bits64(pb, hdr->coef_log2_denom,
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coef & ((1LL << hdr->coef_log2_denom) - 1));
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break;
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case RPU_COEFF_FLOAT:
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fpart.f32 = coef / (float) (1LL << hdr->coef_log2_denom);
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put_bits64(pb, hdr->coef_log2_denom, fpart.u32);
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break;
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}
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}
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static int av_q2den(AVRational q, int den)
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{
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if (q.den == den)
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return q.num;
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q = av_mul_q(q, av_make_q(den, 1));
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return (q.num + (q.den >> 1)) / q.den;
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}
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static void generate_ext_v1(PutBitContext *pb, const AVDOVIDmData *dm)
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{
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int ext_block_length, start_pos, pad_bits;
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switch (dm->level) {
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case 1: ext_block_length = 5; break;
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case 2: ext_block_length = 11; break;
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case 4: ext_block_length = 3; break;
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case 5: ext_block_length = 7; break;
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case 6: ext_block_length = 8; break;
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case 255: ext_block_length = 6; break;
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default: return;
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}
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set_ue_golomb(pb, ext_block_length);
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put_bits(pb, 8, dm->level);
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start_pos = put_bits_count(pb);
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switch (dm->level) {
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case 1:
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put_bits(pb, 12, dm->l1.min_pq);
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put_bits(pb, 12, dm->l1.max_pq);
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put_bits(pb, 12, dm->l1.avg_pq);
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break;
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case 2:
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put_bits(pb, 12, dm->l2.target_max_pq);
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put_bits(pb, 12, dm->l2.trim_slope);
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put_bits(pb, 12, dm->l2.trim_offset);
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put_bits(pb, 12, dm->l2.trim_power);
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put_bits(pb, 12, dm->l2.trim_chroma_weight);
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put_bits(pb, 12, dm->l2.trim_saturation_gain);
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put_bits(pb, 13, dm->l2.ms_weight + 8192);
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break;
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case 4:
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put_bits(pb, 12, dm->l4.anchor_pq);
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put_bits(pb, 12, dm->l4.anchor_power);
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break;
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case 5:
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put_bits(pb, 13, dm->l5.left_offset);
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put_bits(pb, 13, dm->l5.right_offset);
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put_bits(pb, 13, dm->l5.top_offset);
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put_bits(pb, 13, dm->l5.bottom_offset);
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break;
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case 6:
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put_bits(pb, 16, dm->l6.max_luminance);
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put_bits(pb, 16, dm->l6.min_luminance);
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put_bits(pb, 16, dm->l6.max_cll);
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put_bits(pb, 16, dm->l6.max_fall);
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break;
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case 255:
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put_bits(pb, 8, dm->l255.dm_run_mode);
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put_bits(pb, 8, dm->l255.dm_run_version);
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for (int i = 0; i < 4; i++)
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put_bits(pb, 8, dm->l255.dm_debug[i]);
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break;
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}
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pad_bits = ext_block_length * 8 - (put_bits_count(pb) - start_pos);
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av_assert1(pad_bits >= 0);
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put_bits(pb, pad_bits, 0);
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}
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static void put_cie_xy(PutBitContext *pb, AVCIExy xy)
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{
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const int denom = 32767;
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put_sbits(pb, 16, av_q2den(xy.x, denom));
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put_sbits(pb, 16, av_q2den(xy.y, denom));
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}
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#define ANY6(arr) (arr[0] || arr[1] || arr[2] || arr[3] || arr[4] || arr[5])
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#define ANY_XY(xy) (xy.x.num || xy.y.num)
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#define ANY_CSP(csp) (ANY_XY(csp.prim.r) || ANY_XY(csp.prim.g) || \
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ANY_XY(csp.prim.b) || ANY_XY(csp.wp))
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static void generate_ext_v2(PutBitContext *pb, const AVDOVIDmData *dm)
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{
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int ext_block_length, start_pos, pad_bits;
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switch (dm->level) {
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case 3: ext_block_length = 5; break;
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case 8:
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if (ANY6(dm->l8.hue_vector_field)) {
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ext_block_length = 25;
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} else if (ANY6(dm->l8.saturation_vector_field)) {
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ext_block_length = 19;
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} else if (dm->l8.clip_trim) {
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ext_block_length = 13;
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} else if (dm->l8.target_mid_contrast) {
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ext_block_length = 12;
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} else {
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ext_block_length = 10;
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}
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break;
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case 9:
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if (ANY_CSP(dm->l9.source_display_primaries)) {
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ext_block_length = 17;
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} else {
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ext_block_length = 1;
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}
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break;
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case 10:
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if (ANY_CSP(dm->l10.target_display_primaries)) {
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ext_block_length = 21;
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} else {
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ext_block_length = 5;
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}
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break;
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case 11: ext_block_length = 4; break;
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case 254: ext_block_length = 2; break;
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default: return;
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}
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set_ue_golomb(pb, ext_block_length);
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put_bits(pb, 8, dm->level);
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start_pos = put_bits_count(pb);
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switch (dm->level) {
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case 3:
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put_bits(pb, 12, dm->l3.min_pq_offset);
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put_bits(pb, 12, dm->l3.max_pq_offset);
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put_bits(pb, 12, dm->l3.avg_pq_offset);
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break;
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case 8:
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put_bits(pb, 8, dm->l8.target_display_index);
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put_bits(pb, 12, dm->l8.trim_slope);
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put_bits(pb, 12, dm->l8.trim_offset);
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put_bits(pb, 12, dm->l8.trim_power);
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put_bits(pb, 12, dm->l8.trim_chroma_weight);
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put_bits(pb, 12, dm->l8.trim_saturation_gain);
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put_bits(pb, 12, dm->l8.ms_weight + 8192);
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if (ext_block_length < 12)
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break;
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put_bits(pb, 12, dm->l8.target_mid_contrast);
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if (ext_block_length < 13)
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break;
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put_bits(pb, 12, dm->l8.clip_trim);
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if (ext_block_length < 19)
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break;
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for (int i = 0; i < 6; i++)
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put_bits(pb, 8, dm->l8.saturation_vector_field[i]);
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if (ext_block_length < 25)
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break;
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for (int i = 0; i < 6; i++)
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put_bits(pb, 8, dm->l8.hue_vector_field[i]);
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break;
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case 9:
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put_bits(pb, 8, dm->l9.source_primary_index);
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if (ext_block_length < 17)
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break;
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put_cie_xy(pb, dm->l9.source_display_primaries.prim.r);
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put_cie_xy(pb, dm->l9.source_display_primaries.prim.g);
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put_cie_xy(pb, dm->l9.source_display_primaries.prim.b);
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put_cie_xy(pb, dm->l9.source_display_primaries.wp);
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break;
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case 10:
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put_bits(pb, 8, dm->l10.target_display_index);
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put_bits(pb, 12, dm->l10.target_max_pq);
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put_bits(pb, 12, dm->l10.target_min_pq);
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put_bits(pb, 8, dm->l10.target_primary_index);
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if (ext_block_length < 21)
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break;
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put_cie_xy(pb, dm->l10.target_display_primaries.prim.r);
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put_cie_xy(pb, dm->l10.target_display_primaries.prim.g);
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put_cie_xy(pb, dm->l10.target_display_primaries.prim.b);
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put_cie_xy(pb, dm->l10.target_display_primaries.wp);
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break;
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case 11:
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put_bits(pb, 8, dm->l11.content_type);
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put_bits(pb, 4, dm->l11.whitepoint);
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put_bits(pb, 1, dm->l11.reference_mode_flag);
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put_bits(pb, 3, 0); /* reserved */
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put_bits(pb, 2, dm->l11.sharpness);
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put_bits(pb, 2, dm->l11.noise_reduction);
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put_bits(pb, 2, dm->l11.mpeg_noise_reduction);
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put_bits(pb, 2, dm->l11.frame_rate_conversion);
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put_bits(pb, 2, dm->l11.brightness);
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put_bits(pb, 2, dm->l11.color);
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break;
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case 254:
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put_bits(pb, 8, dm->l254.dm_mode);
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put_bits(pb, 8, dm->l254.dm_version_index);
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break;
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}
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pad_bits = ext_block_length * 8 - (put_bits_count(pb) - start_pos);
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av_assert1(pad_bits >= 0);
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put_bits(pb, pad_bits, 0);
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}
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int ff_dovi_rpu_generate(DOVIContext *s, const AVDOVIMetadata *metadata,
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uint8_t **out_rpu, int *out_size)
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{
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PutBitContext *pb = &(PutBitContext){0};
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const AVDOVIRpuDataHeader *hdr;
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const AVDOVIDataMapping *mapping;
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const AVDOVIColorMetadata *color;
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int vdr_dm_metadata_changed, vdr_rpu_id, use_prev_vdr_rpu, profile,
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buffer_size, rpu_size, pad, zero_run;
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int num_ext_blocks_v1, num_ext_blocks_v2;
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uint32_t crc;
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uint8_t *dst;
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if (!metadata) {
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*out_rpu = NULL;
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*out_size = 0;
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return 0;
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}
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hdr = av_dovi_get_header(metadata);
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mapping = av_dovi_get_mapping(metadata);
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color = av_dovi_get_color(metadata);
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av_assert0(s->cfg.dv_profile);
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if (hdr->rpu_type != 2) {
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av_log(s->logctx, AV_LOG_ERROR, "Unhandled RPU type %"PRIu8"\n",
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hdr->rpu_type);
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return AVERROR_INVALIDDATA;
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}
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vdr_rpu_id = -1;
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for (int i = 0; i <= DOVI_MAX_DM_ID; i++) {
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if (s->vdr[i] && !memcmp(&s->vdr[i]->mapping, mapping, sizeof(*mapping))) {
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vdr_rpu_id = i;
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break;
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} else if (vdr_rpu_id < 0 && (!s->vdr[i] || i == DOVI_MAX_DM_ID)) {
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vdr_rpu_id = i;
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}
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}
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if (!s->vdr[vdr_rpu_id]) {
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s->vdr[vdr_rpu_id] = ff_refstruct_allocz(sizeof(DOVIVdr));
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if (!s->vdr[vdr_rpu_id])
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return AVERROR(ENOMEM);
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}
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if (!s->vdr[color->dm_metadata_id]) {
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s->vdr[color->dm_metadata_id] = ff_refstruct_allocz(sizeof(DOVIVdr));
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if (!s->vdr[color->dm_metadata_id])
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return AVERROR(ENOMEM);
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}
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num_ext_blocks_v1 = num_ext_blocks_v2 = 0;
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for (int i = 0; i < metadata->num_ext_blocks; i++) {
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const AVDOVIDmData *dm = av_dovi_get_ext(metadata, i);
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switch (dm->level) {
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case 1:
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case 2:
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case 4:
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case 5:
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case 6:
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case 255:
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num_ext_blocks_v1++;
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break;
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case 3:
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case 8:
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case 9:
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case 10:
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case 11:
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case 254:
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num_ext_blocks_v2++;
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break;
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default:
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av_log(s->logctx, AV_LOG_ERROR, "Invalid ext block level %d\n",
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dm->level);
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return AVERROR_INVALIDDATA;
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}
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}
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vdr_dm_metadata_changed = !s->color || memcmp(s->color, color, sizeof(*color));
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use_prev_vdr_rpu = !memcmp(&s->vdr[vdr_rpu_id]->mapping, mapping, sizeof(*mapping));
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buffer_size = 12 /* vdr seq info */ + 5 /* CRC32 + terminator */;
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buffer_size += num_ext_blocks_v1 * 13;
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buffer_size += num_ext_blocks_v2 * 28;
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if (!use_prev_vdr_rpu) {
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buffer_size += 160;
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for (int c = 0; c < 3; c++) {
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for (int i = 0; i < mapping->curves[c].num_pivots - 1; i++) {
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switch (mapping->curves[c].mapping_idc[i]) {
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case AV_DOVI_MAPPING_POLYNOMIAL: buffer_size += 26; break;
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case AV_DOVI_MAPPING_MMR: buffer_size += 177; break;
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}
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}
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}
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}
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if (vdr_dm_metadata_changed)
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buffer_size += 67;
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av_fast_padded_malloc(&s->rpu_buf, &s->rpu_buf_sz, buffer_size);
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if (!s->rpu_buf)
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return AVERROR(ENOMEM);
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init_put_bits(pb, s->rpu_buf, s->rpu_buf_sz);
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/* RPU header */
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put_bits(pb, 6, hdr->rpu_type);
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put_bits(pb, 11, hdr->rpu_format);
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put_bits(pb, 4, hdr->vdr_rpu_profile);
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put_bits(pb, 4, hdr->vdr_rpu_level);
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put_bits(pb, 1, 1); /* vdr_seq_info_present */
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put_bits(pb, 1, hdr->chroma_resampling_explicit_filter_flag);
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put_bits(pb, 2, hdr->coef_data_type);
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if (hdr->coef_data_type == RPU_COEFF_FIXED)
|
||||
set_ue_golomb(pb, hdr->coef_log2_denom);
|
||||
put_bits(pb, 2, hdr->vdr_rpu_normalized_idc);
|
||||
put_bits(pb, 1, hdr->bl_video_full_range_flag);
|
||||
if ((hdr->rpu_format & 0x700) == 0) {
|
||||
set_ue_golomb(pb, hdr->bl_bit_depth - 8);
|
||||
set_ue_golomb(pb, hdr->el_bit_depth - 8);
|
||||
set_ue_golomb(pb, hdr->vdr_bit_depth - 8);
|
||||
put_bits(pb, 1, hdr->spatial_resampling_filter_flag);
|
||||
put_bits(pb, 3, 0); /* reserved_zero_3bits */
|
||||
put_bits(pb, 1, hdr->el_spatial_resampling_filter_flag);
|
||||
put_bits(pb, 1, hdr->disable_residual_flag);
|
||||
}
|
||||
s->header = *hdr;
|
||||
|
||||
put_bits(pb, 1, vdr_dm_metadata_changed);
|
||||
put_bits(pb, 1, use_prev_vdr_rpu);
|
||||
set_ue_golomb(pb, vdr_rpu_id);
|
||||
s->mapping = &s->vdr[vdr_rpu_id]->mapping;
|
||||
|
||||
if (!use_prev_vdr_rpu) {
|
||||
set_ue_golomb(pb, mapping->mapping_color_space);
|
||||
set_ue_golomb(pb, mapping->mapping_chroma_format_idc);
|
||||
for (int c = 0; c < 3; c++) {
|
||||
const AVDOVIReshapingCurve *curve = &mapping->curves[c];
|
||||
int prev = 0;
|
||||
set_ue_golomb(pb, curve->num_pivots - 2);
|
||||
for (int i = 0; i < curve->num_pivots; i++) {
|
||||
put_bits(pb, hdr->bl_bit_depth, curve->pivots[i] - prev);
|
||||
prev = curve->pivots[i];
|
||||
}
|
||||
}
|
||||
|
||||
if (mapping->nlq_method_idc != AV_DOVI_NLQ_NONE) {
|
||||
put_bits(pb, 3, mapping->nlq_method_idc);
|
||||
put_bits(pb, hdr->bl_bit_depth, mapping->nlq_pivots[0]);
|
||||
put_bits(pb, hdr->bl_bit_depth, mapping->nlq_pivots[1] - mapping->nlq_pivots[0]);
|
||||
}
|
||||
|
||||
set_ue_golomb(pb, mapping->num_x_partitions - 1);
|
||||
set_ue_golomb(pb, mapping->num_y_partitions - 1);
|
||||
|
||||
for (int c = 0; c < 3; c++) {
|
||||
const AVDOVIReshapingCurve *curve = &mapping->curves[c];
|
||||
for (int i = 0; i < curve->num_pivots - 1; i++) {
|
||||
set_ue_golomb(pb, curve->mapping_idc[i]);
|
||||
switch (curve->mapping_idc[i]) {
|
||||
case AV_DOVI_MAPPING_POLYNOMIAL: {
|
||||
set_ue_golomb(pb, curve->poly_order[i] - 1);
|
||||
if (curve->poly_order[i] == 1)
|
||||
put_bits(pb, 1, 0); /* linear_interp_flag */
|
||||
for (int k = 0; k <= curve->poly_order[i]; k++)
|
||||
put_se_coef(pb, hdr, curve->poly_coef[i][k]);
|
||||
break;
|
||||
}
|
||||
case AV_DOVI_MAPPING_MMR: {
|
||||
put_bits(pb, 2, curve->mmr_order[i] - 1);
|
||||
put_se_coef(pb, hdr, curve->mmr_constant[i]);
|
||||
for (int j = 0; j < curve->mmr_order[i]; j++) {
|
||||
for (int k = 0; k < 7; k++)
|
||||
put_se_coef(pb, hdr, curve->mmr_coef[i][j][k]);
|
||||
}
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (mapping->nlq_method_idc != AV_DOVI_NLQ_NONE) {
|
||||
for (int c = 0; c < 3; c++) {
|
||||
const AVDOVINLQParams *nlq = &mapping->nlq[c];
|
||||
put_bits(pb, hdr->el_bit_depth, nlq->nlq_offset);
|
||||
put_ue_coef(pb, hdr, nlq->vdr_in_max);
|
||||
switch (mapping->nlq_method_idc) {
|
||||
case AV_DOVI_NLQ_LINEAR_DZ:
|
||||
put_ue_coef(pb, hdr, nlq->linear_deadzone_slope);
|
||||
put_ue_coef(pb, hdr, nlq->linear_deadzone_threshold);
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
memcpy(&s->vdr[vdr_rpu_id]->mapping, mapping, sizeof(*mapping));
|
||||
}
|
||||
|
||||
if (vdr_dm_metadata_changed) {
|
||||
const int denom = profile == 4 ? (1 << 30) : (1 << 28);
|
||||
set_ue_golomb(pb, color->dm_metadata_id); /* affected_dm_id */
|
||||
set_ue_golomb(pb, color->dm_metadata_id); /* current_dm_id */
|
||||
set_ue_golomb(pb, color->scene_refresh_flag);
|
||||
for (int i = 0; i < 9; i++)
|
||||
put_sbits(pb, 16, av_q2den(color->ycc_to_rgb_matrix[i], 1 << 13));
|
||||
for (int i = 0; i < 3; i++)
|
||||
put_bits32(pb, av_q2den(color->ycc_to_rgb_offset[i], denom));
|
||||
for (int i = 0; i < 9; i++)
|
||||
put_sbits(pb, 16, av_q2den(color->rgb_to_lms_matrix[i], 1 << 14));
|
||||
put_bits(pb, 16, color->signal_eotf);
|
||||
put_bits(pb, 16, color->signal_eotf_param0);
|
||||
put_bits(pb, 16, color->signal_eotf_param1);
|
||||
put_bits32(pb, color->signal_eotf_param2);
|
||||
put_bits(pb, 5, color->signal_bit_depth);
|
||||
put_bits(pb, 2, color->signal_color_space);
|
||||
put_bits(pb, 2, color->signal_chroma_format);
|
||||
put_bits(pb, 2, color->signal_full_range_flag);
|
||||
put_bits(pb, 12, color->source_min_pq);
|
||||
put_bits(pb, 12, color->source_max_pq);
|
||||
put_bits(pb, 10, color->source_diagonal);
|
||||
|
||||
memcpy(&s->vdr[color->dm_metadata_id]->color, color, sizeof(*color));
|
||||
s->color = &s->vdr[color->dm_metadata_id]->color;
|
||||
}
|
||||
|
||||
set_ue_golomb(pb, num_ext_blocks_v1);
|
||||
align_put_bits(pb);
|
||||
for (int i = 0; i < metadata->num_ext_blocks; i++)
|
||||
generate_ext_v1(pb, av_dovi_get_ext(metadata, i));
|
||||
|
||||
if (num_ext_blocks_v2) {
|
||||
set_ue_golomb(pb, num_ext_blocks_v2);
|
||||
align_put_bits(pb);
|
||||
for (int i = 0; i < metadata->num_ext_blocks; i++)
|
||||
generate_ext_v2(pb, av_dovi_get_ext(metadata, i));
|
||||
}
|
||||
|
||||
flush_put_bits(pb);
|
||||
crc = av_bswap32(av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1,
|
||||
s->rpu_buf, put_bytes_output(pb)));
|
||||
put_bits32(pb, crc);
|
||||
put_bits(pb, 8, 0x80); /* terminator */
|
||||
flush_put_bits(pb);
|
||||
|
||||
rpu_size = put_bytes_output(pb);
|
||||
switch (s->cfg.dv_profile) {
|
||||
case 10:
|
||||
/* AV1 uses T.35 OBU with EMDF header */
|
||||
*out_rpu = av_malloc(rpu_size + 15);
|
||||
if (!*out_rpu)
|
||||
return AVERROR(ENOMEM);
|
||||
init_put_bits(pb, *out_rpu, rpu_size + 15);
|
||||
put_bits(pb, 8, ITU_T_T35_COUNTRY_CODE_US);
|
||||
put_bits(pb, 16, ITU_T_T35_PROVIDER_CODE_DOLBY);
|
||||
put_bits32(pb, 0x800); /* provider_oriented_code */
|
||||
put_bits(pb, 27, 0x01be6841u); /* fixed EMDF header, see above */
|
||||
if (rpu_size > 0xFF) {
|
||||
av_assert2(rpu_size <= 0x10000);
|
||||
put_bits(pb, 8, (rpu_size >> 8) - 1);
|
||||
put_bits(pb, 1, 1); /* read_more */
|
||||
put_bits(pb, 8, rpu_size & 0xFF);
|
||||
put_bits(pb, 1, 0);
|
||||
} else {
|
||||
put_bits(pb, 8, rpu_size);
|
||||
put_bits(pb, 1, 0);
|
||||
}
|
||||
ff_copy_bits(pb, s->rpu_buf, rpu_size * 8);
|
||||
put_bits(pb, 17, 0x400); /* emdf payload id + emdf_protection */
|
||||
|
||||
pad = pb->bit_left & 7;
|
||||
put_bits(pb, pad, (1 << pad) - 1); /* pad to next byte with 1 bits */
|
||||
flush_put_bits(pb);
|
||||
*out_size = put_bytes_output(pb);
|
||||
return 0;
|
||||
|
||||
case 5:
|
||||
case 8:
|
||||
*out_rpu = dst = av_malloc(1 + rpu_size * 3 / 2); /* worst case */
|
||||
if (!*out_rpu)
|
||||
return AVERROR(ENOMEM);
|
||||
*dst++ = 25; /* NAL prefix */
|
||||
zero_run = 0;
|
||||
for (int i = 0; i < rpu_size; i++) {
|
||||
if (zero_run < 2) {
|
||||
if (s->rpu_buf[i] == 0) {
|
||||
zero_run++;
|
||||
} else {
|
||||
zero_run = 0;
|
||||
}
|
||||
} else {
|
||||
if ((s->rpu_buf[i] & ~3) == 0) {
|
||||
/* emulation prevention */
|
||||
*dst++ = 3;
|
||||
}
|
||||
zero_run = s->rpu_buf[i] == 0;
|
||||
}
|
||||
*dst++ = s->rpu_buf[i];
|
||||
}
|
||||
*out_size = dst - *out_rpu;
|
||||
return 0;
|
||||
|
||||
default:
|
||||
/* Should be unreachable */
|
||||
av_assert0(0);
|
||||
return AVERROR_BUG;
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user