475 lines
14 KiB
C
475 lines
14 KiB
C
#include "mpeg4-hevc.h"
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#include "mpeg4-avc.h"
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#include <string.h>
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#include <assert.h>
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#include <errno.h>
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#define H265_NAL_BLA_W_LP 16
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#define H265_NAL_RSV_IRAP 23
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#define H265_NAL_VPS 32
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#define H265_NAL_SPS 33
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#define H265_NAL_PPS 34
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#define H265_NAL_AUD 35
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#define H265_NAL_SEI_PREFIX 39
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#define H265_NAL_SEI_SUFFIX 40
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#define MAX(x, y) ((x) > (y) ? (x) : (y))
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#define BIT(ptr, off) (((ptr)[(off) / 8] >> (7 - ((off) % 8))) & 0x01)
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struct h265_annexbtomp4_handle_t
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{
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struct mpeg4_hevc_t* hevc;
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int errcode;
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int* update; // avc sps/pps update flags
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int* vcl;
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uint8_t* out;
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size_t bytes;
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size_t capacity;
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};
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uint8_t mpeg4_h264_read_ue(const uint8_t* data, size_t bytes, size_t* offset);
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static size_t hevc_rbsp_decode(const uint8_t* nalu, size_t bytes, uint8_t* sodb, size_t len)
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{
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size_t i, j;
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const size_t max_sps_luma_bit_depth_offset = 256;
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for (j = i = 0; i < bytes && j < len && i < max_sps_luma_bit_depth_offset; i++)
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{
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if (i + 2 < bytes && 0 == nalu[i] && 0 == nalu[i + 1] && 0x03 == nalu[i + 2])
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{
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sodb[j++] = nalu[i];
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sodb[j++] = nalu[i + 1];
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i += 2;
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}
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else
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{
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sodb[j++] = nalu[i];
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}
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}
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return j;
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}
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static int hevc_profile_tier_level(const uint8_t* nalu, size_t bytes, uint8_t maxNumSubLayersMinus1, struct mpeg4_hevc_t* hevc)
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{
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size_t n;
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uint8_t i;
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uint8_t sub_layer_profile_present_flag[8];
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uint8_t sub_layer_level_present_flag[8];
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if (bytes < 12)
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return -1;
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hevc->general_profile_space = (nalu[0] >> 6) & 0x03;
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hevc->general_tier_flag = (nalu[0] >> 5) & 0x01;
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hevc->general_profile_idc = nalu[0] & 0x1f;
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hevc->general_profile_compatibility_flags = 0;
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hevc->general_profile_compatibility_flags |= nalu[1] << 24;
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hevc->general_profile_compatibility_flags |= nalu[2] << 16;
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hevc->general_profile_compatibility_flags |= nalu[3] << 8;
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hevc->general_profile_compatibility_flags |= nalu[4];
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hevc->general_constraint_indicator_flags = 0;
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hevc->general_constraint_indicator_flags |= ((uint64_t)nalu[5]) << 40;
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hevc->general_constraint_indicator_flags |= ((uint64_t)nalu[6]) << 32;
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hevc->general_constraint_indicator_flags |= ((uint64_t)nalu[7]) << 24;
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hevc->general_constraint_indicator_flags |= ((uint64_t)nalu[8]) << 16;
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hevc->general_constraint_indicator_flags |= ((uint64_t)nalu[9]) << 8;
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hevc->general_constraint_indicator_flags |= nalu[10];
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hevc->general_level_idc = nalu[11];
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if (maxNumSubLayersMinus1 < 1)
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return 12;
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if (bytes < 14)
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return -1; // error
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for (i = 0; i < maxNumSubLayersMinus1; i++)
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{
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sub_layer_profile_present_flag[i] = BIT(nalu, 12 * 8 + i * 2);
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sub_layer_level_present_flag[i] = BIT(nalu, 12 * 8 + i * 2 + 1);
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}
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n = 12 + 2;
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for (i = 0; i < maxNumSubLayersMinus1; i++)
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{
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if(sub_layer_profile_present_flag[i])
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n += 11;
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if (sub_layer_level_present_flag[i])
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n += 1;
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}
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return bytes >= n ? (int)n : -1;
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}
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static uint8_t hevc_vps_id(const uint8_t* rbsp, size_t bytes, struct mpeg4_hevc_t* hevc, uint8_t* ptr, size_t len)
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{
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size_t sodb;
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uint8_t vps;
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uint8_t vps_max_sub_layers_minus1;
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uint8_t vps_temporal_id_nesting_flag;
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sodb = hevc_rbsp_decode(rbsp, bytes, ptr, len);
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if (sodb < 16 + 2)
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return 0xFF;
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vps = ptr[2] >> 4; // 2-nalu type
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vps_max_sub_layers_minus1 = (ptr[3] >> 1) & 0x07;
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vps_temporal_id_nesting_flag = ptr[3] & 0x01;
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hevc->numTemporalLayers = MAX(hevc->numTemporalLayers, vps_max_sub_layers_minus1 + 1);
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hevc->temporalIdNested = (hevc->temporalIdNested || vps_temporal_id_nesting_flag) ? 1 : 0;
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hevc_profile_tier_level(ptr + 6, sodb - 6, vps_max_sub_layers_minus1, hevc);
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return vps;
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}
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static uint8_t hevc_sps_id(const uint8_t* rbsp, size_t bytes, struct mpeg4_hevc_t* hevc, uint8_t* ptr, size_t len, uint8_t* vps)
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{
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size_t n;
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size_t sodb;
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uint8_t sps;
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uint8_t sps_max_sub_layers_minus1;
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uint8_t sps_temporal_id_nesting_flag;
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uint8_t conformance_window_flag;
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sodb = hevc_rbsp_decode(rbsp, bytes, ptr, len);
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if (sodb < 12+3)
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return 0xFF;
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*vps = ptr[2] >> 4; // 2-nalu type
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sps_max_sub_layers_minus1 = (ptr[2] >> 1) & 0x07;
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sps_temporal_id_nesting_flag = ptr[2] & 0x01;
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n = hevc_profile_tier_level(ptr + 3, sodb - 3, sps_max_sub_layers_minus1, hevc);
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if (n <= 0)
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return 0xFF;
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n = (n + 3) * 8;
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sps = mpeg4_h264_read_ue(ptr, sodb, &n);
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hevc->chromaFormat = mpeg4_h264_read_ue(ptr, sodb, &n);
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if (3 == hevc->chromaFormat)
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n++;
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mpeg4_h264_read_ue(ptr, sodb, &n); // pic_width_in_luma_samples
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mpeg4_h264_read_ue(ptr, sodb, &n); // pic_height_in_luma_samples
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conformance_window_flag = BIT(ptr, n); n++; // conformance_window_flag
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if (conformance_window_flag)
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{
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mpeg4_h264_read_ue(ptr, sodb, &n); // conf_win_left_offset
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mpeg4_h264_read_ue(ptr, sodb, &n); // conf_win_right_offset
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mpeg4_h264_read_ue(ptr, sodb, &n); // conf_win_top_offset
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mpeg4_h264_read_ue(ptr, sodb, &n); // conf_win_bottom_offset
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}
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hevc->bitDepthLumaMinus8 = mpeg4_h264_read_ue(ptr, sodb, &n);
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hevc->bitDepthChromaMinus8 = mpeg4_h264_read_ue(ptr, sodb, &n);
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// TODO: vui_parameters
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//mp4->hevc->min_spatial_segmentation_idc; // min_spatial_segmentation_idc
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return sps;
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}
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static uint8_t hevc_pps_id(const uint8_t* rbsp, size_t bytes, struct mpeg4_hevc_t* hevc, uint8_t* ptr, size_t len, uint8_t* sps)
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{
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uint8_t pps;
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size_t sodb;
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size_t offset = 2 * 8; // 2-nalu type
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sodb = hevc_rbsp_decode(rbsp, bytes, ptr, len);
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if (sodb < 3)
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return 0xFF; (void)hevc;
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pps = mpeg4_h264_read_ue(ptr, sodb, &offset);
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*sps = mpeg4_h264_read_ue(ptr, sodb, &offset);
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return pps;
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}
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static void mpeg4_hevc_remove(struct mpeg4_hevc_t* hevc, uint8_t* ptr, size_t bytes, const uint8_t* end)
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{
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uint8_t i;
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assert(ptr >= hevc->data && ptr + bytes <= end && end <= hevc->data + sizeof(hevc->data));
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memmove(ptr, ptr + bytes, end - ptr - bytes);
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for (i = 0; i < hevc->numOfArrays; i++)
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{
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if (hevc->nalu[i].data > ptr)
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hevc->nalu[i].data -= bytes;
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}
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}
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static int mpeg4_hevc_update2(struct mpeg4_hevc_t* hevc, int i, const uint8_t* nalu, size_t bytes)
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{
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if (bytes == hevc->nalu[i].bytes && 0 == memcmp(nalu, hevc->nalu[i].data, bytes))
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return 0; // do nothing
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if (bytes > hevc->nalu[i].bytes && hevc->off + (bytes - hevc->nalu[i].bytes) > sizeof(hevc->data))
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{
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assert(0);
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return -1; // too big
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}
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mpeg4_hevc_remove(hevc, hevc->nalu[i].data, hevc->nalu[i].bytes, hevc->data + hevc->off);
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hevc->off -= hevc->nalu[i].bytes;
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hevc->nalu[i].data = hevc->data + hevc->off;
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hevc->nalu[i].bytes = (uint16_t)bytes;
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memcpy(hevc->nalu[i].data, nalu, bytes);
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hevc->off += bytes;
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return 1;
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}
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static int mpeg4_hevc_add(struct mpeg4_hevc_t* hevc, uint8_t type, const uint8_t* nalu, size_t bytes)
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{
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// copy new
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assert(hevc->numOfArrays < sizeof(hevc->nalu) / sizeof(hevc->nalu[0]));
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if (hevc->numOfArrays >= sizeof(hevc->nalu) / sizeof(hevc->nalu[0])
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|| hevc->off + bytes > sizeof(hevc->data))
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{
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assert(0);
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return -1;
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}
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hevc->nalu[hevc->numOfArrays].type = type;
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hevc->nalu[hevc->numOfArrays].bytes = (uint16_t)bytes;
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hevc->nalu[hevc->numOfArrays].array_completeness = 1;
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hevc->nalu[hevc->numOfArrays].data = hevc->data + hevc->off;
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memcpy(hevc->nalu[hevc->numOfArrays].data, nalu, bytes);
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hevc->off += bytes;
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++hevc->numOfArrays;
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return 1;
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}
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static int h265_vps_copy(struct mpeg4_hevc_t* hevc, const uint8_t* nalu, size_t bytes)
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{
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int i;
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uint8_t vpsid;
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if (bytes < 3)
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{
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assert(0);
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return -1; // invalid length
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}
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vpsid = hevc_vps_id(nalu, bytes, hevc, hevc->data + hevc->off, sizeof(hevc->data)-hevc->off);
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for (i = 0; i < hevc->numOfArrays; i++)
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{
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if (H265_NAL_VPS == hevc->nalu[i].type && vpsid == hevc_vps_id(hevc->nalu[i].data, hevc->nalu[i].bytes, hevc, hevc->data + hevc->off, sizeof(hevc->data) - hevc->off))
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return mpeg4_hevc_update2(hevc, i, nalu, bytes);
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}
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return mpeg4_hevc_add(hevc, H265_NAL_VPS, nalu, bytes);
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}
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static int h265_sps_copy(struct mpeg4_hevc_t* hevc, const uint8_t* nalu, size_t bytes)
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{
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int i;
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uint8_t spsid;
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uint8_t vpsid, vpsid2;
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if (bytes < 13 + 2)
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{
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assert(0);
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return -1; // invalid length
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}
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spsid = hevc_sps_id(nalu, bytes, hevc, hevc->data + hevc->off, sizeof(hevc->data) - hevc->off, &vpsid);
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for (i = 0; i < hevc->numOfArrays; i++)
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{
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if (H265_NAL_SPS == hevc->nalu[i].type && spsid == hevc_sps_id(hevc->nalu[i].data, hevc->nalu[i].bytes, hevc, hevc->data + hevc->off, sizeof(hevc->data) - hevc->off, &vpsid2) && vpsid == vpsid2)
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return mpeg4_hevc_update2(hevc, i, nalu, bytes);
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}
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return mpeg4_hevc_add(hevc, H265_NAL_SPS, nalu, bytes);
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}
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static int h265_pps_copy(struct mpeg4_hevc_t* hevc, const uint8_t* nalu, size_t bytes)
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{
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int i;
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uint8_t ppsid;
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uint8_t spsid, spsid2;
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if (bytes < 1 + 2)
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{
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assert(0);
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return -1; // invalid length
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}
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ppsid = hevc_pps_id(nalu, bytes, hevc, hevc->data + hevc->off, sizeof(hevc->data) - hevc->off, &spsid);
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for (i = 0; i < hevc->numOfArrays; i++)
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{
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if (H265_NAL_PPS == hevc->nalu[i].type && ppsid == hevc_pps_id(hevc->nalu[i].data, hevc->nalu[i].bytes, hevc, hevc->data + hevc->off, sizeof(hevc->data) - hevc->off, &spsid2) && spsid == spsid2)
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return mpeg4_hevc_update2(hevc, i, nalu, bytes);
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}
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return mpeg4_hevc_add(hevc, H265_NAL_PPS, nalu, bytes);
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}
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static int h265_sei_clear(struct mpeg4_hevc_t* hevc)
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{
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int i;
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for (i = 0; i < hevc->numOfArrays; i++)
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{
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if (H265_NAL_SEI_PREFIX == hevc->nalu[i].type || H265_NAL_SEI_SUFFIX == hevc->nalu[i].type)
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{
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mpeg4_hevc_remove(hevc, hevc->nalu[i].data, hevc->nalu[i].bytes, hevc->data + hevc->off);
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hevc->off -= hevc->nalu[i].bytes;
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if(i + 1 < hevc->numOfArrays)
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memmove(hevc->nalu + i, hevc->nalu + i + 1, sizeof(hevc->nalu[0]) * (hevc->numOfArrays - i - 1));
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--hevc->numOfArrays;
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--i;
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}
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}
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return 0;
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}
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int mpeg4_hevc_update(struct mpeg4_hevc_t* hevc, const uint8_t* nalu, size_t bytes)
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{
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int r;
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switch ((nalu[0] >> 1) & 0x3f)
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{
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case H265_NAL_VPS:
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h265_sei_clear(hevc); // remove all prefix/suffix sei
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r = h265_vps_copy(hevc, nalu, bytes);
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break;
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case H265_NAL_SPS:
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r = h265_sps_copy(hevc, nalu, bytes);
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break;
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case H265_NAL_PPS:
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r = h265_pps_copy(hevc, nalu, bytes);
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break;
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#if defined(H265_FILTER_SEI)
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case H265_NAL_SEI_PREFIX:
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r = mpeg4_hevc_add(hevc, H265_NAL_SEI_PREFIX, nalu, bytes);
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break;
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case H265_NAL_SEI_SUFFIX:
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r = mpeg4_hevc_add(hevc, H265_NAL_SEI_SUFFIX, nalu, bytes);
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break;
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#endif
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default:
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r = 0;
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break;
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}
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return r;
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}
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static void hevc_handler(void* param, const uint8_t* nalu, size_t bytes)
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{
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int r;
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uint8_t nalutype;
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struct h265_annexbtomp4_handle_t* mp4;
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mp4 = (struct h265_annexbtomp4_handle_t*)param;
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if (bytes < 2)
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{
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assert(0);
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return;
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}
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nalutype = (nalu[0] >> 1) & 0x3f;
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#if defined(H2645_FILTER_AUD)
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if(H265_NAL_AUD == nalutype)
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return; // ignore AUD
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#endif
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r = mpeg4_hevc_update(mp4->hevc, nalu, bytes);
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if (1 == r && mp4->update)
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*mp4->update = 1;
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else if (r < 0)
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mp4->errcode = r;
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// IRAP-1, B/P-2, other-0
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if (mp4->vcl && nalutype < H265_NAL_VPS)
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*mp4->vcl = H265_NAL_BLA_W_LP<=nalutype && nalutype<=H265_NAL_RSV_IRAP ? 1 : 2;
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if (mp4->capacity >= mp4->bytes + bytes + 4)
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{
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mp4->out[mp4->bytes + 0] = (uint8_t)((bytes >> 24) & 0xFF);
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mp4->out[mp4->bytes + 1] = (uint8_t)((bytes >> 16) & 0xFF);
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mp4->out[mp4->bytes + 2] = (uint8_t)((bytes >> 8) & 0xFF);
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mp4->out[mp4->bytes + 3] = (uint8_t)((bytes >> 0) & 0xFF);
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memmove(mp4->out + mp4->bytes + 4, nalu, bytes);
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mp4->bytes += bytes + 4;
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}
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else
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{
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mp4->errcode = -1;
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}
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}
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int h265_annexbtomp4(struct mpeg4_hevc_t* hevc, const void* data, size_t bytes, void* out, size_t size, int *vcl, int* update)
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{
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struct h265_annexbtomp4_handle_t h;
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memset(&h, 0, sizeof(h));
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h.hevc = hevc;
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h.vcl = vcl;
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h.update = update;
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h.out = (uint8_t*)out;
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h.capacity = size;
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if (vcl) *vcl = 0;
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if (update) *update = 0;
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// hevc->numTemporalLayers = 0;
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// hevc->temporalIdNested = 0;
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// hevc->min_spatial_segmentation_idc = 0;
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// hevc->general_profile_compatibility_flags = 0xffffffff;
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// hevc->general_constraint_indicator_flags = 0xffffffffffULL;
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// hevc->chromaFormat = 1; // 4:2:0
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mpeg4_h264_annexb_nalu((const uint8_t*)data, bytes, hevc_handler, &h);
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hevc->configurationVersion = 1;
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hevc->lengthSizeMinusOne = 3; // 4 bytes
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|
return 0 == h.errcode ? (int)h.bytes : 0;
|
|
}
|
|
|
|
int h265_is_new_access_unit(const uint8_t* nalu, size_t bytes)
|
|
{
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|
enum { NAL_VPS = 32, NAL_SPS = 33, NAL_PPS = 34, NAL_AUD = 35, NAL_PREFIX_SEI = 39, };
|
|
|
|
uint8_t nal_type;
|
|
uint8_t nuh_layer_id;
|
|
|
|
if(bytes < 3)
|
|
return 0;
|
|
|
|
nal_type = (nalu[0] >> 1) & 0x3f;
|
|
nuh_layer_id = ((nalu[0] & 0x01) << 5) | ((nalu[1] >> 3) &0x1F);
|
|
|
|
// 7.4.2.4.4 Order of NAL units and coded pictures and their association to access units
|
|
if(NAL_VPS == nal_type || NAL_SPS == nal_type || NAL_PPS == nal_type ||
|
|
(nuh_layer_id == 0 && (NAL_AUD == nal_type || NAL_PREFIX_SEI == nal_type || (41 <= nal_type && nal_type <= 44) || (48 <= nal_type && nal_type <= 55))))
|
|
return 1;
|
|
|
|
// 7.4.2.4.5 Order of VCL NAL units and association to coded pictures
|
|
if (nal_type <= 31)
|
|
{
|
|
//first_slice_segment_in_pic_flag 0x80
|
|
return (nalu[2] & 0x80) ? 1 : 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#if defined(_DEBUG) || defined(DEBUG)
|
|
void hevc_annexbtomp4_test(void)
|
|
{
|
|
const uint8_t vps[] = { 0x40, 0x01, 0x0c, 0x01, 0xff, 0xff, 0x01, 0x60, 0x00, 0x00, 0x03, 0x00, 0x80, 0x00, 0x00, 0x03, 0x00, 0x00, 0x03, 0x00, 0x78, 0x9d, 0xc0, 0x90 };
|
|
const uint8_t sps[] = { 0x42, 0x01, 0x01, 0x01, 0x60, 0x00, 0x00, 0x03, 0x00, 0x80, 0x00, 0x00, 0x03, 0x00, 0x00, 0x03, 0x00, 0x78, 0xa0, 0x03, 0xc0, 0x80, 0x32, 0x16, 0x59, 0xde, 0x49, 0x1b, 0x6b, 0x80, 0x40, 0x00, 0x00, 0xfa, 0x00, 0x00, 0x17, 0x70, 0x02 };
|
|
const uint8_t pps[] = { 0x44, 0x01, 0xc1, 0x73, 0xd1, 0x89 };
|
|
const uint8_t annexb[] = { 0x00, 0x00, 0x00, 0x01, 0x4e, 0x01, 0x06, 0x01, 0xd0, 0x80, 0x00, 0x00, 0x00, 0x01, 0x40, 0x01, 0x0c, 0x01, 0xff, 0xff, 0x01, 0x60, 0x00, 0x00, 0x03, 0x00, 0x80, 0x00, 0x00, 0x03, 0x00, 0x00, 0x03, 0x00, 0x78, 0x9d, 0xc0, 0x90, 0x00, 0x00, 0x00, 0x01, 0x42, 0x01, 0x01, 0x01, 0x60, 0x00, 0x00, 0x03, 0x00, 0x80, 0x00, 0x00, 0x03, 0x00, 0x00, 0x03, 0x00, 0x78, 0xa0, 0x03, 0xc0, 0x80, 0x32, 0x16, 0x59, 0xde, 0x49, 0x1b, 0x6b, 0x80, 0x40, 0x00, 0x00, 0xfa, 0x00, 0x00, 0x17, 0x70, 0x02, 0x00, 0x00, 0x00, 0x01, 0x44, 0x01, 0xc1, 0x73, 0xd1, 0x89 };
|
|
uint8_t output[512];
|
|
int vcl, update;
|
|
|
|
struct mpeg4_hevc_t hevc;
|
|
memset(&hevc, 0, sizeof(hevc));
|
|
assert(h265_annexbtomp4(&hevc, annexb, sizeof(annexb), output, sizeof(output), &vcl, &update) > 0);
|
|
assert(3 == hevc.numOfArrays && vcl == 0 && update == 1);
|
|
assert(hevc.nalu[0].bytes == sizeof(vps) && 0 == memcmp(hevc.nalu[0].data, vps, sizeof(vps)));
|
|
assert(hevc.nalu[1].bytes == sizeof(sps) && 0 == memcmp(hevc.nalu[1].data, sps, sizeof(sps)));
|
|
assert(hevc.nalu[2].bytes == sizeof(pps) && 0 == memcmp(hevc.nalu[2].data, pps, sizeof(pps)));
|
|
}
|
|
#endif
|