mirror of
https://github.com/pineappleEA/pineapple-src.git
synced 2024-12-09 21:58:24 -05:00
452 lines
14 KiB
C
Executable File
452 lines
14 KiB
C
Executable File
/*
|
|
* AVC helper functions for muxers
|
|
* Copyright (c) 2006 Baptiste Coudurier <baptiste.coudurier@smartjog.com>
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "libavutil/intreadwrite.h"
|
|
#include "libavcodec/h264.h"
|
|
#include "libavcodec/get_bits.h"
|
|
#include "avformat.h"
|
|
#include "avio.h"
|
|
#include "avc.h"
|
|
#include "avio_internal.h"
|
|
|
|
static const uint8_t *avc_find_startcode_internal(const uint8_t *p, const uint8_t *end)
|
|
{
|
|
const uint8_t *a = p + 4 - ((intptr_t)p & 3);
|
|
|
|
for (end -= 3; p < a && p < end; p++) {
|
|
if (p[0] == 0 && p[1] == 0 && p[2] == 1)
|
|
return p;
|
|
}
|
|
|
|
for (end -= 3; p < end; p += 4) {
|
|
uint32_t x = *(const uint32_t*)p;
|
|
// if ((x - 0x01000100) & (~x) & 0x80008000) // little endian
|
|
// if ((x - 0x00010001) & (~x) & 0x00800080) // big endian
|
|
if ((x - 0x01010101) & (~x) & 0x80808080) { // generic
|
|
if (p[1] == 0) {
|
|
if (p[0] == 0 && p[2] == 1)
|
|
return p;
|
|
if (p[2] == 0 && p[3] == 1)
|
|
return p+1;
|
|
}
|
|
if (p[3] == 0) {
|
|
if (p[2] == 0 && p[4] == 1)
|
|
return p+2;
|
|
if (p[4] == 0 && p[5] == 1)
|
|
return p+3;
|
|
}
|
|
}
|
|
}
|
|
|
|
for (end += 3; p < end; p++) {
|
|
if (p[0] == 0 && p[1] == 0 && p[2] == 1)
|
|
return p;
|
|
}
|
|
|
|
return end + 3;
|
|
}
|
|
|
|
const uint8_t *ff_avc_find_startcode(const uint8_t *p, const uint8_t *end){
|
|
const uint8_t *out = avc_find_startcode_internal(p, end);
|
|
if(p<out && out<end && !out[-1]) out--;
|
|
return out;
|
|
}
|
|
|
|
int ff_avc_parse_nal_units(AVIOContext *pb, const uint8_t *buf_in, int size)
|
|
{
|
|
const uint8_t *p = buf_in;
|
|
const uint8_t *end = p + size;
|
|
const uint8_t *nal_start, *nal_end;
|
|
|
|
size = 0;
|
|
nal_start = ff_avc_find_startcode(p, end);
|
|
for (;;) {
|
|
while (nal_start < end && !*(nal_start++));
|
|
if (nal_start == end)
|
|
break;
|
|
|
|
nal_end = ff_avc_find_startcode(nal_start, end);
|
|
avio_wb32(pb, nal_end - nal_start);
|
|
avio_write(pb, nal_start, nal_end - nal_start);
|
|
size += 4 + nal_end - nal_start;
|
|
nal_start = nal_end;
|
|
}
|
|
return size;
|
|
}
|
|
|
|
int ff_avc_parse_nal_units_buf(const uint8_t *buf_in, uint8_t **buf, int *size)
|
|
{
|
|
AVIOContext *pb;
|
|
int ret = avio_open_dyn_buf(&pb);
|
|
if(ret < 0)
|
|
return ret;
|
|
|
|
ff_avc_parse_nal_units(pb, buf_in, *size);
|
|
|
|
*size = avio_close_dyn_buf(pb, buf);
|
|
return 0;
|
|
}
|
|
|
|
int ff_isom_write_avcc(AVIOContext *pb, const uint8_t *data, int len)
|
|
{
|
|
AVIOContext *sps_pb = NULL, *pps_pb = NULL, *sps_ext_pb = NULL;
|
|
uint8_t *buf, *end, *start;
|
|
uint8_t *sps, *pps, *sps_ext;
|
|
uint32_t sps_size = 0, pps_size = 0, sps_ext_size = 0;
|
|
int ret, nb_sps = 0, nb_pps = 0, nb_sps_ext = 0;
|
|
|
|
if (len <= 6)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
/* check for H.264 start code */
|
|
if (AV_RB32(data) != 0x00000001 &&
|
|
AV_RB24(data) != 0x000001) {
|
|
avio_write(pb, data, len);
|
|
return 0;
|
|
}
|
|
|
|
ret = ff_avc_parse_nal_units_buf(data, &buf, &len);
|
|
if (ret < 0)
|
|
return ret;
|
|
start = buf;
|
|
end = buf + len;
|
|
|
|
ret = avio_open_dyn_buf(&sps_pb);
|
|
if (ret < 0)
|
|
goto fail;
|
|
ret = avio_open_dyn_buf(&pps_pb);
|
|
if (ret < 0)
|
|
goto fail;
|
|
ret = avio_open_dyn_buf(&sps_ext_pb);
|
|
if (ret < 0)
|
|
goto fail;
|
|
|
|
/* look for sps and pps */
|
|
while (end - buf > 4) {
|
|
uint32_t size;
|
|
uint8_t nal_type;
|
|
size = FFMIN(AV_RB32(buf), end - buf - 4);
|
|
buf += 4;
|
|
nal_type = buf[0] & 0x1f;
|
|
|
|
if (nal_type == 7) { /* SPS */
|
|
nb_sps++;
|
|
if (size > UINT16_MAX || nb_sps >= H264_MAX_SPS_COUNT) {
|
|
ret = AVERROR_INVALIDDATA;
|
|
goto fail;
|
|
}
|
|
avio_wb16(sps_pb, size);
|
|
avio_write(sps_pb, buf, size);
|
|
} else if (nal_type == 8) { /* PPS */
|
|
nb_pps++;
|
|
if (size > UINT16_MAX || nb_pps >= H264_MAX_PPS_COUNT) {
|
|
ret = AVERROR_INVALIDDATA;
|
|
goto fail;
|
|
}
|
|
avio_wb16(pps_pb, size);
|
|
avio_write(pps_pb, buf, size);
|
|
} else if (nal_type == 13) { /* SPS_EXT */
|
|
nb_sps_ext++;
|
|
if (size > UINT16_MAX || nb_sps_ext >= 256) {
|
|
ret = AVERROR_INVALIDDATA;
|
|
goto fail;
|
|
}
|
|
avio_wb16(sps_ext_pb, size);
|
|
avio_write(sps_ext_pb, buf, size);
|
|
}
|
|
|
|
buf += size;
|
|
}
|
|
sps_size = avio_get_dyn_buf(sps_pb, &sps);
|
|
pps_size = avio_get_dyn_buf(pps_pb, &pps);
|
|
sps_ext_size = avio_get_dyn_buf(sps_ext_pb, &sps_ext);
|
|
|
|
if (sps_size < 6 || !pps_size) {
|
|
ret = AVERROR_INVALIDDATA;
|
|
goto fail;
|
|
}
|
|
|
|
avio_w8(pb, 1); /* version */
|
|
avio_w8(pb, sps[3]); /* profile */
|
|
avio_w8(pb, sps[4]); /* profile compat */
|
|
avio_w8(pb, sps[5]); /* level */
|
|
avio_w8(pb, 0xff); /* 6 bits reserved (111111) + 2 bits nal size length - 1 (11) */
|
|
avio_w8(pb, 0xe0 | nb_sps); /* 3 bits reserved (111) + 5 bits number of sps */
|
|
|
|
avio_write(pb, sps, sps_size);
|
|
avio_w8(pb, nb_pps); /* number of pps */
|
|
avio_write(pb, pps, pps_size);
|
|
|
|
if (sps[3] != 66 && sps[3] != 77 && sps[3] != 88) {
|
|
H264SPS seq;
|
|
ret = ff_avc_decode_sps(&seq, sps + 3, sps_size - 3);
|
|
if (ret < 0)
|
|
goto fail;
|
|
|
|
avio_w8(pb, 0xfc | seq.chroma_format_idc); /* 6 bits reserved (111111) + chroma_format_idc */
|
|
avio_w8(pb, 0xf8 | (seq.bit_depth_luma - 8)); /* 5 bits reserved (11111) + bit_depth_luma_minus8 */
|
|
avio_w8(pb, 0xf8 | (seq.bit_depth_chroma - 8)); /* 5 bits reserved (11111) + bit_depth_chroma_minus8 */
|
|
avio_w8(pb, nb_sps_ext); /* number of sps ext */
|
|
if (nb_sps_ext)
|
|
avio_write(pb, sps_ext, sps_ext_size);
|
|
}
|
|
|
|
fail:
|
|
ffio_free_dyn_buf(&sps_pb);
|
|
ffio_free_dyn_buf(&pps_pb);
|
|
ffio_free_dyn_buf(&sps_ext_pb);
|
|
av_free(start);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int ff_avc_write_annexb_extradata(const uint8_t *in, uint8_t **buf, int *size)
|
|
{
|
|
uint16_t sps_size, pps_size;
|
|
uint8_t *out;
|
|
int out_size;
|
|
|
|
*buf = NULL;
|
|
if (*size >= 4 && (AV_RB32(in) == 0x00000001 || AV_RB24(in) == 0x000001))
|
|
return 0;
|
|
if (*size < 11 || in[0] != 1)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
sps_size = AV_RB16(&in[6]);
|
|
if (11 + sps_size > *size)
|
|
return AVERROR_INVALIDDATA;
|
|
pps_size = AV_RB16(&in[9 + sps_size]);
|
|
if (11 + sps_size + pps_size > *size)
|
|
return AVERROR_INVALIDDATA;
|
|
out_size = 8 + sps_size + pps_size;
|
|
out = av_mallocz(out_size + AV_INPUT_BUFFER_PADDING_SIZE);
|
|
if (!out)
|
|
return AVERROR(ENOMEM);
|
|
AV_WB32(&out[0], 0x00000001);
|
|
memcpy(out + 4, &in[8], sps_size);
|
|
AV_WB32(&out[4 + sps_size], 0x00000001);
|
|
memcpy(out + 8 + sps_size, &in[11 + sps_size], pps_size);
|
|
*buf = out;
|
|
*size = out_size;
|
|
return 0;
|
|
}
|
|
|
|
const uint8_t *ff_avc_mp4_find_startcode(const uint8_t *start,
|
|
const uint8_t *end,
|
|
int nal_length_size)
|
|
{
|
|
unsigned int res = 0;
|
|
|
|
if (end - start < nal_length_size)
|
|
return NULL;
|
|
while (nal_length_size--)
|
|
res = (res << 8) | *start++;
|
|
|
|
if (res > end - start)
|
|
return NULL;
|
|
|
|
return start + res;
|
|
}
|
|
|
|
uint8_t *ff_nal_unit_extract_rbsp(const uint8_t *src, uint32_t src_len,
|
|
uint32_t *dst_len, int header_len)
|
|
{
|
|
uint8_t *dst;
|
|
uint32_t i, len;
|
|
|
|
dst = av_malloc(src_len + AV_INPUT_BUFFER_PADDING_SIZE);
|
|
if (!dst)
|
|
return NULL;
|
|
|
|
/* NAL unit header */
|
|
i = len = 0;
|
|
while (i < header_len && i < src_len)
|
|
dst[len++] = src[i++];
|
|
|
|
while (i + 2 < src_len)
|
|
if (!src[i] && !src[i + 1] && src[i + 2] == 3) {
|
|
dst[len++] = src[i++];
|
|
dst[len++] = src[i++];
|
|
i++; // remove emulation_prevention_three_byte
|
|
} else
|
|
dst[len++] = src[i++];
|
|
|
|
while (i < src_len)
|
|
dst[len++] = src[i++];
|
|
|
|
memset(dst + len, 0, AV_INPUT_BUFFER_PADDING_SIZE);
|
|
|
|
*dst_len = len;
|
|
return dst;
|
|
}
|
|
|
|
static const AVRational avc_sample_aspect_ratio[17] = {
|
|
{ 0, 1 },
|
|
{ 1, 1 },
|
|
{ 12, 11 },
|
|
{ 10, 11 },
|
|
{ 16, 11 },
|
|
{ 40, 33 },
|
|
{ 24, 11 },
|
|
{ 20, 11 },
|
|
{ 32, 11 },
|
|
{ 80, 33 },
|
|
{ 18, 11 },
|
|
{ 15, 11 },
|
|
{ 64, 33 },
|
|
{ 160, 99 },
|
|
{ 4, 3 },
|
|
{ 3, 2 },
|
|
{ 2, 1 },
|
|
};
|
|
|
|
static inline int get_ue_golomb(GetBitContext *gb) {
|
|
int i;
|
|
for (i = 0; i < 32 && !get_bits1(gb); i++)
|
|
;
|
|
return get_bitsz(gb, i) + (1 << i) - 1;
|
|
}
|
|
|
|
static inline int get_se_golomb(GetBitContext *gb) {
|
|
int v = get_ue_golomb(gb) + 1;
|
|
int sign = -(v & 1);
|
|
return ((v >> 1) ^ sign) - sign;
|
|
}
|
|
|
|
int ff_avc_decode_sps(H264SPS *sps, const uint8_t *buf, int buf_size)
|
|
{
|
|
int i, j, ret, rbsp_size, aspect_ratio_idc, pic_order_cnt_type;
|
|
int num_ref_frames_in_pic_order_cnt_cycle;
|
|
int delta_scale, lastScale = 8, nextScale = 8;
|
|
int sizeOfScalingList;
|
|
GetBitContext gb;
|
|
uint8_t *rbsp_buf;
|
|
|
|
rbsp_buf = ff_nal_unit_extract_rbsp(buf, buf_size, &rbsp_size, 0);
|
|
if (!rbsp_buf)
|
|
return AVERROR(ENOMEM);
|
|
|
|
ret = init_get_bits8(&gb, rbsp_buf, rbsp_size);
|
|
if (ret < 0)
|
|
goto end;
|
|
|
|
memset(sps, 0, sizeof(*sps));
|
|
|
|
sps->profile_idc = get_bits(&gb, 8);
|
|
sps->constraint_set_flags |= get_bits1(&gb) << 0; // constraint_set0_flag
|
|
sps->constraint_set_flags |= get_bits1(&gb) << 1; // constraint_set1_flag
|
|
sps->constraint_set_flags |= get_bits1(&gb) << 2; // constraint_set2_flag
|
|
sps->constraint_set_flags |= get_bits1(&gb) << 3; // constraint_set3_flag
|
|
sps->constraint_set_flags |= get_bits1(&gb) << 4; // constraint_set4_flag
|
|
sps->constraint_set_flags |= get_bits1(&gb) << 5; // constraint_set5_flag
|
|
skip_bits(&gb, 2); // reserved_zero_2bits
|
|
sps->level_idc = get_bits(&gb, 8);
|
|
sps->id = get_ue_golomb(&gb);
|
|
|
|
if (sps->profile_idc == 100 || sps->profile_idc == 110 ||
|
|
sps->profile_idc == 122 || sps->profile_idc == 244 || sps->profile_idc == 44 ||
|
|
sps->profile_idc == 83 || sps->profile_idc == 86 || sps->profile_idc == 118 ||
|
|
sps->profile_idc == 128 || sps->profile_idc == 138 || sps->profile_idc == 139 ||
|
|
sps->profile_idc == 134) {
|
|
sps->chroma_format_idc = get_ue_golomb(&gb); // chroma_format_idc
|
|
if (sps->chroma_format_idc == 3) {
|
|
skip_bits1(&gb); // separate_colour_plane_flag
|
|
}
|
|
sps->bit_depth_luma = get_ue_golomb(&gb) + 8;
|
|
sps->bit_depth_chroma = get_ue_golomb(&gb) + 8;
|
|
skip_bits1(&gb); // qpprime_y_zero_transform_bypass_flag
|
|
if (get_bits1(&gb)) { // seq_scaling_matrix_present_flag
|
|
for (i = 0; i < ((sps->chroma_format_idc != 3) ? 8 : 12); i++) {
|
|
if (!get_bits1(&gb)) // seq_scaling_list_present_flag
|
|
continue;
|
|
lastScale = 8;
|
|
nextScale = 8;
|
|
sizeOfScalingList = i < 6 ? 16 : 64;
|
|
for (j = 0; j < sizeOfScalingList; j++) {
|
|
if (nextScale != 0) {
|
|
delta_scale = get_se_golomb(&gb);
|
|
nextScale = (lastScale + delta_scale) & 0xff;
|
|
}
|
|
lastScale = nextScale == 0 ? lastScale : nextScale;
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
sps->chroma_format_idc = 1;
|
|
sps->bit_depth_luma = 8;
|
|
sps->bit_depth_chroma = 8;
|
|
}
|
|
|
|
get_ue_golomb(&gb); // log2_max_frame_num_minus4
|
|
pic_order_cnt_type = get_ue_golomb(&gb);
|
|
|
|
if (pic_order_cnt_type == 0) {
|
|
get_ue_golomb(&gb); // log2_max_pic_order_cnt_lsb_minus4
|
|
} else if (pic_order_cnt_type == 1) {
|
|
skip_bits1(&gb); // delta_pic_order_always_zero
|
|
get_se_golomb(&gb); // offset_for_non_ref_pic
|
|
get_se_golomb(&gb); // offset_for_top_to_bottom_field
|
|
num_ref_frames_in_pic_order_cnt_cycle = get_ue_golomb(&gb);
|
|
for (i = 0; i < num_ref_frames_in_pic_order_cnt_cycle; i++)
|
|
get_se_golomb(&gb); // offset_for_ref_frame
|
|
}
|
|
|
|
get_ue_golomb(&gb); // max_num_ref_frames
|
|
skip_bits1(&gb); // gaps_in_frame_num_value_allowed_flag
|
|
get_ue_golomb(&gb); // pic_width_in_mbs_minus1
|
|
get_ue_golomb(&gb); // pic_height_in_map_units_minus1
|
|
|
|
sps->frame_mbs_only_flag = get_bits1(&gb);
|
|
if (!sps->frame_mbs_only_flag)
|
|
skip_bits1(&gb); // mb_adaptive_frame_field_flag
|
|
|
|
skip_bits1(&gb); // direct_8x8_inference_flag
|
|
|
|
if (get_bits1(&gb)) { // frame_cropping_flag
|
|
get_ue_golomb(&gb); // frame_crop_left_offset
|
|
get_ue_golomb(&gb); // frame_crop_right_offset
|
|
get_ue_golomb(&gb); // frame_crop_top_offset
|
|
get_ue_golomb(&gb); // frame_crop_bottom_offset
|
|
}
|
|
|
|
if (get_bits1(&gb)) { // vui_parameters_present_flag
|
|
if (get_bits1(&gb)) { // aspect_ratio_info_present_flag
|
|
aspect_ratio_idc = get_bits(&gb, 8);
|
|
if (aspect_ratio_idc == 0xff) {
|
|
sps->sar.num = get_bits(&gb, 16);
|
|
sps->sar.den = get_bits(&gb, 16);
|
|
} else if (aspect_ratio_idc < FF_ARRAY_ELEMS(avc_sample_aspect_ratio)) {
|
|
sps->sar = avc_sample_aspect_ratio[aspect_ratio_idc];
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!sps->sar.den) {
|
|
sps->sar.num = 1;
|
|
sps->sar.den = 1;
|
|
}
|
|
|
|
ret = 0;
|
|
end:
|
|
av_free(rbsp_buf);
|
|
return ret;
|
|
}
|