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1167 lines
23 KiB
1167 lines
23 KiB
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#include <ngx_config.h>
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#include <ngx_core.h>
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#include "ngx_rtmp_mp4.h"
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#include <ngx_rtmp_codec_module.h>
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static ngx_int_t
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ngx_rtmp_mp4_field_32(ngx_buf_t *b, uint32_t n)
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{
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u_char bytes[4];
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bytes[0] = ((uint32_t) n >> 24) & 0xFF;
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bytes[1] = ((uint32_t) n >> 16) & 0xFF;
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bytes[2] = ((uint32_t) n >> 8) & 0xFF;
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bytes[3] = (uint32_t) n & 0xFF;
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if (b->last + sizeof(bytes) > b->end) {
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return NGX_ERROR;
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}
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b->last = ngx_cpymem(b->last, bytes, sizeof(bytes));
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return NGX_OK;
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}
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static ngx_int_t
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ngx_rtmp_mp4_field_24(ngx_buf_t *b, uint32_t n)
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{
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u_char bytes[3];
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bytes[0] = ((uint32_t) n >> 16) & 0xFF;
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bytes[1] = ((uint32_t) n >> 8) & 0xFF;
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bytes[2] = (uint32_t) n & 0xFF;
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if (b->last + sizeof(bytes) > b->end) {
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return NGX_ERROR;
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}
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b->last = ngx_cpymem(b->last, bytes, sizeof(bytes));
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return NGX_OK;
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}
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static ngx_int_t
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ngx_rtmp_mp4_field_16(ngx_buf_t *b, uint16_t n)
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{
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u_char bytes[2];
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bytes[0] = ((uint32_t) n >> 8) & 0xFF;
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bytes[1] = (uint32_t) n & 0xFF;
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if (b->last + sizeof(bytes) > b->end) {
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return NGX_ERROR;
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}
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b->last = ngx_cpymem(b->last, bytes, sizeof(bytes));
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return NGX_OK;
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}
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static ngx_int_t
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ngx_rtmp_mp4_field_8(ngx_buf_t *b, uint8_t n)
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{
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u_char bytes[1];
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bytes[0] = n & 0xFF;
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if (b->last + sizeof(bytes) > b->end) {
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return NGX_ERROR;
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}
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b->last = ngx_cpymem(b->last, bytes, sizeof(bytes));
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return NGX_OK;
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}
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static ngx_int_t
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ngx_rtmp_mp4_put_descr(ngx_buf_t *b, int tag, size_t size)
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{
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ngx_rtmp_mp4_field_8(b, (uint8_t) tag);
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ngx_rtmp_mp4_field_8(b, size & 0x7F);
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return NGX_OK;
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}
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static ngx_int_t
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ngx_rtmp_mp4_data(ngx_buf_t *b, void *data, size_t n)
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{
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if (b->last + n > b->end) {
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return NGX_ERROR;
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}
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b->last = ngx_cpymem(b->last, (u_char *) data, n);
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return NGX_OK;
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}
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static ngx_int_t
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ngx_rtmp_mp4_box(ngx_buf_t *b, const char box[4])
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{
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if (b->last + 4 > b->end) {
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return NGX_ERROR;
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}
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b->last = ngx_cpymem(b->last, (u_char *) box, 4);
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return NGX_OK;
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}
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static u_char *
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ngx_rtmp_mp4_start_box(ngx_buf_t *b, const char box[4])
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{
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u_char *p;
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p = b->last;
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if (ngx_rtmp_mp4_field_32(b, 0) != NGX_OK) {
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return NULL;
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}
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if (ngx_rtmp_mp4_box(b, box) != NGX_OK) {
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return NULL;
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}
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return p;
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}
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static ngx_int_t
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ngx_rtmp_mp4_update_box_size(ngx_buf_t *b, u_char *p)
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{
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u_char *curpos;
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if (p == NULL) {
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return NGX_ERROR;
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}
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curpos = b->last;
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b->last = p;
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ngx_rtmp_mp4_field_32(b, (uint32_t) (curpos - p));
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b->last = curpos;
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return NGX_OK;
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}
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static ngx_int_t
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ngx_rtmp_mp4_write_matrix(ngx_buf_t *buf, uint32_t a, uint32_t b, uint32_t c,
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uint32_t d, uint32_t tx, uint32_t ty)
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{
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/*
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* transformation matrix
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* |a b u|
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* |c d v|
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* |tx ty w|
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*/
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ngx_rtmp_mp4_field_32(buf, a << 16); /* 16.16 format */
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ngx_rtmp_mp4_field_32(buf, b << 16); /* 16.16 format */
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ngx_rtmp_mp4_field_32(buf, 0); /* u in 2.30 format */
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ngx_rtmp_mp4_field_32(buf, c << 16); /* 16.16 format */
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ngx_rtmp_mp4_field_32(buf, d << 16); /* 16.16 format */
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ngx_rtmp_mp4_field_32(buf, 0); /* v in 2.30 format */
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ngx_rtmp_mp4_field_32(buf, tx << 16); /* 16.16 format */
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ngx_rtmp_mp4_field_32(buf, ty << 16); /* 16.16 format */
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ngx_rtmp_mp4_field_32(buf, 1 << 30); /* w in 2.30 format */
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return NGX_OK;
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}
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ngx_int_t
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ngx_rtmp_mp4_write_ftyp(ngx_buf_t *b)
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{
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u_char *pos;
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pos = ngx_rtmp_mp4_start_box(b, "ftyp");
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/* major brand */
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ngx_rtmp_mp4_box(b, "iso6");
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/* minor version */
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ngx_rtmp_mp4_field_32(b, 1);
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/* compatible brands */
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ngx_rtmp_mp4_box(b, "isom");
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ngx_rtmp_mp4_box(b, "iso6");
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ngx_rtmp_mp4_box(b, "dash");
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ngx_rtmp_mp4_update_box_size(b, pos);
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return NGX_OK;
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}
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ngx_int_t
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ngx_rtmp_mp4_write_styp(ngx_buf_t *b)
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{
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u_char *pos;
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pos = ngx_rtmp_mp4_start_box(b, "styp");
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/* major brand */
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ngx_rtmp_mp4_box(b, "iso6");
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/* minor version */
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ngx_rtmp_mp4_field_32(b, 1);
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/* compatible brands */
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ngx_rtmp_mp4_box(b, "isom");
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ngx_rtmp_mp4_box(b, "iso6");
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ngx_rtmp_mp4_box(b, "dash");
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ngx_rtmp_mp4_update_box_size(b, pos);
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return NGX_OK;
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}
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static ngx_int_t
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ngx_rtmp_mp4_write_mvhd(ngx_buf_t *b)
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{
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u_char *pos;
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pos = ngx_rtmp_mp4_start_box(b, "mvhd");
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/* version */
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ngx_rtmp_mp4_field_32(b, 0);
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/* creation time */
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ngx_rtmp_mp4_field_32(b, 0);
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/* modification time */
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ngx_rtmp_mp4_field_32(b, 0);
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/* timescale */
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ngx_rtmp_mp4_field_32(b, 1000);
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/* duration */
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ngx_rtmp_mp4_field_32(b, 0);
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/* reserved */
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ngx_rtmp_mp4_field_32(b, 0x00010000);
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ngx_rtmp_mp4_field_16(b, 0x0100);
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ngx_rtmp_mp4_field_16(b, 0);
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ngx_rtmp_mp4_field_32(b, 0);
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ngx_rtmp_mp4_field_32(b, 0);
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ngx_rtmp_mp4_write_matrix(b, 1, 0, 0, 1, 0, 0);
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/* reserved */
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ngx_rtmp_mp4_field_32(b, 0);
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ngx_rtmp_mp4_field_32(b, 0);
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ngx_rtmp_mp4_field_32(b, 0);
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ngx_rtmp_mp4_field_32(b, 0);
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ngx_rtmp_mp4_field_32(b, 0);
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ngx_rtmp_mp4_field_32(b, 0);
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/* next track id */
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ngx_rtmp_mp4_field_32(b, 1);
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ngx_rtmp_mp4_update_box_size(b, pos);
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return NGX_OK;
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}
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static ngx_int_t
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ngx_rtmp_mp4_write_tkhd(ngx_rtmp_session_t *s, ngx_buf_t *b,
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ngx_rtmp_mp4_track_type_t ttype)
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{
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u_char *pos;
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ngx_rtmp_codec_ctx_t *codec_ctx;
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codec_ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_codec_module);
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pos = ngx_rtmp_mp4_start_box(b, "tkhd");
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/* version */
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ngx_rtmp_mp4_field_8(b, 0);
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/* flags: TrackEnabled */
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ngx_rtmp_mp4_field_24(b, 0x0000000f);
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/* creation time */
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ngx_rtmp_mp4_field_32(b, 0);
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/* modification time */
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ngx_rtmp_mp4_field_32(b, 0);
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/* track id */
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ngx_rtmp_mp4_field_32(b, 1);
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/* reserved */
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ngx_rtmp_mp4_field_32(b, 0);
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/* duration */
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ngx_rtmp_mp4_field_32(b, 0);
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/* reserved */
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ngx_rtmp_mp4_field_32(b, 0);
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ngx_rtmp_mp4_field_32(b, 0);
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ngx_rtmp_mp4_field_32(b, 0);
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/* reserved */
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ngx_rtmp_mp4_field_16(b, ttype == NGX_RTMP_MP4_VIDEO_TRACK ? 0 : 0x0100);
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/* reserved */
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ngx_rtmp_mp4_field_16(b, 0);
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ngx_rtmp_mp4_write_matrix(b, 1, 0, 0, 1, 0, 0);
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if (ttype == NGX_RTMP_MP4_VIDEO_TRACK) {
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ngx_rtmp_mp4_field_32(b, (uint32_t) codec_ctx->width << 16);
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ngx_rtmp_mp4_field_32(b, (uint32_t) codec_ctx->height << 16);
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} else {
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ngx_rtmp_mp4_field_32(b, 0);
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ngx_rtmp_mp4_field_32(b, 0);
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}
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ngx_rtmp_mp4_update_box_size(b, pos);
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return NGX_OK;
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}
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static ngx_int_t
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ngx_rtmp_mp4_write_mdhd(ngx_buf_t *b)
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{
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u_char *pos;
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pos = ngx_rtmp_mp4_start_box(b, "mdhd");
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/* version */
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ngx_rtmp_mp4_field_32(b, 0);
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/* creation time */
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ngx_rtmp_mp4_field_32(b, 0);
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/* modification time */
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ngx_rtmp_mp4_field_32(b, 0);
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/* time scale*/
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ngx_rtmp_mp4_field_32(b, 1000);
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/* duration */
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ngx_rtmp_mp4_field_32(b, 0);
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/* lanuguage */
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ngx_rtmp_mp4_field_16(b, 0x15C7);
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/* reserved */
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ngx_rtmp_mp4_field_16(b, 0);
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ngx_rtmp_mp4_update_box_size(b, pos);
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return NGX_OK;
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}
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static ngx_int_t
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ngx_rtmp_mp4_write_hdlr(ngx_buf_t *b, ngx_rtmp_mp4_track_type_t ttype)
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{
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u_char *pos;
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pos = ngx_rtmp_mp4_start_box(b, "hdlr");
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/* version and flags */
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ngx_rtmp_mp4_field_32(b, 0);
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/* pre defined */
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ngx_rtmp_mp4_field_32(b, 0);
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if (ttype == NGX_RTMP_MP4_VIDEO_TRACK) {
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ngx_rtmp_mp4_box(b, "vide");
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} else {
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ngx_rtmp_mp4_box(b, "soun");
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}
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/* reserved */
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ngx_rtmp_mp4_field_32(b, 0);
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ngx_rtmp_mp4_field_32(b, 0);
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ngx_rtmp_mp4_field_32(b, 0);
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if (ttype == NGX_RTMP_MP4_VIDEO_TRACK) {
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/* video handler string, NULL-terminated */
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ngx_rtmp_mp4_data(b, "VideoHandler", sizeof("VideoHandler"));
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} else {
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/* sound handler string, NULL-terminated */
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ngx_rtmp_mp4_data(b, "SoundHandler", sizeof("SoundHandler"));
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}
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ngx_rtmp_mp4_update_box_size(b, pos);
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return NGX_OK;
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}
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static ngx_int_t
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ngx_rtmp_mp4_write_vmhd(ngx_buf_t *b)
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{
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/* size is always 20, apparently */
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ngx_rtmp_mp4_field_32(b, 20);
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ngx_rtmp_mp4_box(b, "vmhd");
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/* version and flags */
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ngx_rtmp_mp4_field_32(b, 0x01);
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/* reserved (graphics mode=copy) */
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ngx_rtmp_mp4_field_32(b, 0);
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ngx_rtmp_mp4_field_32(b, 0);
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return NGX_OK;
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}
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static ngx_int_t
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ngx_rtmp_mp4_write_smhd(ngx_buf_t *b)
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{
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/* size is always 16, apparently */
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ngx_rtmp_mp4_field_32(b, 16);
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ngx_rtmp_mp4_box(b, "smhd");
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/* version and flags */
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ngx_rtmp_mp4_field_32(b, 0);
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/* reserved (balance normally=0) */
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ngx_rtmp_mp4_field_16(b, 0);
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ngx_rtmp_mp4_field_16(b, 0);
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return NGX_OK;
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}
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static ngx_int_t
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ngx_rtmp_mp4_write_dref(ngx_buf_t *b)
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{
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u_char *pos;
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pos = ngx_rtmp_mp4_start_box(b, "dref");
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/* version and flags */
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ngx_rtmp_mp4_field_32(b, 0);
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/* entry count */
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ngx_rtmp_mp4_field_32(b, 1);
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/* url size */
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ngx_rtmp_mp4_field_32(b, 0xc);
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ngx_rtmp_mp4_box(b, "url ");
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/* version and flags */
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ngx_rtmp_mp4_field_32(b, 0x00000001);
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ngx_rtmp_mp4_update_box_size(b, pos);
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return NGX_OK;
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}
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static ngx_int_t
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ngx_rtmp_mp4_write_dinf(ngx_buf_t *b)
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{
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u_char *pos;
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pos = ngx_rtmp_mp4_start_box(b, "dinf");
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ngx_rtmp_mp4_write_dref(b);
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ngx_rtmp_mp4_update_box_size(b, pos);
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return NGX_OK;
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}
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static ngx_int_t
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ngx_rtmp_mp4_write_avcc(ngx_rtmp_session_t *s, ngx_buf_t *b)
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{
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u_char *pos, *p;
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ngx_chain_t *in;
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ngx_rtmp_codec_ctx_t *codec_ctx;
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codec_ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_codec_module);
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if (codec_ctx == NULL) {
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return NGX_ERROR;
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}
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in = codec_ctx->avc_header;
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if (in == NULL) {
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return NGX_ERROR;
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}
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pos = ngx_rtmp_mp4_start_box(b, "avcC");
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/* assume config fits one chunk (highly probable) */
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/*
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* Skip:
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* - flv fmt
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* - H264 CONF/PICT (0x00)
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* - 0
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* - 0
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* - 0
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*/
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p = in->buf->pos + 5;
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if (p < in->buf->last) {
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ngx_rtmp_mp4_data(b, p, (size_t) (in->buf->last - p));
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} else {
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ngx_log_error(NGX_LOG_ERR, s->connection->log, ngx_errno,
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"dash: invalid avcc received");
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|
}
|
|
|
|
ngx_rtmp_mp4_update_box_size(b, pos);
|
|
|
|
return NGX_OK;
|
|
}
|
|
|
|
|
|
static ngx_int_t
|
|
ngx_rtmp_mp4_write_video(ngx_rtmp_session_t *s, ngx_buf_t *b)
|
|
{
|
|
u_char *pos;
|
|
ngx_rtmp_codec_ctx_t *codec_ctx;
|
|
|
|
codec_ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_codec_module);
|
|
|
|
pos = ngx_rtmp_mp4_start_box(b, "avc1");
|
|
|
|
/* reserved */
|
|
ngx_rtmp_mp4_field_32(b, 0);
|
|
ngx_rtmp_mp4_field_16(b, 0);
|
|
|
|
/* data reference index */
|
|
ngx_rtmp_mp4_field_16(b, 1);
|
|
|
|
/* codec stream version & revision */
|
|
ngx_rtmp_mp4_field_16(b, 0);
|
|
ngx_rtmp_mp4_field_16(b, 0);
|
|
|
|
/* reserved */
|
|
ngx_rtmp_mp4_field_32(b, 0);
|
|
ngx_rtmp_mp4_field_32(b, 0);
|
|
ngx_rtmp_mp4_field_32(b, 0);
|
|
|
|
/* width & height */
|
|
ngx_rtmp_mp4_field_16(b, (uint16_t) codec_ctx->width);
|
|
ngx_rtmp_mp4_field_16(b, (uint16_t) codec_ctx->height);
|
|
|
|
/* horizontal & vertical resolutions 72 dpi */
|
|
ngx_rtmp_mp4_field_32(b, 0x00480000);
|
|
ngx_rtmp_mp4_field_32(b, 0x00480000);
|
|
|
|
/* data size */
|
|
ngx_rtmp_mp4_field_32(b, 0);
|
|
|
|
/* frame count */
|
|
ngx_rtmp_mp4_field_16(b, 1);
|
|
|
|
/* compressor name */
|
|
ngx_rtmp_mp4_field_32(b, 0);
|
|
ngx_rtmp_mp4_field_32(b, 0);
|
|
ngx_rtmp_mp4_field_32(b, 0);
|
|
|
|
/* reserved */
|
|
ngx_rtmp_mp4_field_32(b, 0);
|
|
ngx_rtmp_mp4_field_32(b, 0);
|
|
ngx_rtmp_mp4_field_32(b, 0);
|
|
ngx_rtmp_mp4_field_32(b, 0);
|
|
ngx_rtmp_mp4_field_32(b, 0);
|
|
ngx_rtmp_mp4_field_16(b, 0x18);
|
|
ngx_rtmp_mp4_field_16(b, 0xffff);
|
|
|
|
ngx_rtmp_mp4_write_avcc(s, b);
|
|
|
|
ngx_rtmp_mp4_update_box_size(b, pos);
|
|
|
|
return NGX_OK;
|
|
}
|
|
|
|
|
|
static ngx_int_t
|
|
ngx_rtmp_mp4_write_esds(ngx_rtmp_session_t *s, ngx_buf_t *b)
|
|
{
|
|
size_t dsi_len;
|
|
u_char *pos, *dsi;
|
|
ngx_buf_t *db;
|
|
ngx_rtmp_codec_ctx_t *codec_ctx;
|
|
|
|
codec_ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_codec_module);
|
|
|
|
if (codec_ctx == NULL || codec_ctx->aac_header == NULL) {
|
|
return NGX_ERROR;
|
|
}
|
|
|
|
db = codec_ctx->aac_header->buf;
|
|
if (db == NULL) {
|
|
return NGX_ERROR;
|
|
}
|
|
|
|
dsi = db->pos + 2;
|
|
if (dsi > db->last) {
|
|
return NGX_ERROR;
|
|
}
|
|
|
|
dsi_len = db->last - dsi;
|
|
|
|
pos = ngx_rtmp_mp4_start_box(b, "esds");
|
|
|
|
/* version */
|
|
ngx_rtmp_mp4_field_32(b, 0);
|
|
|
|
|
|
/* ES Descriptor */
|
|
|
|
ngx_rtmp_mp4_put_descr(b, 0x03, 23 + dsi_len);
|
|
|
|
/* ES_ID */
|
|
ngx_rtmp_mp4_field_16(b, 1);
|
|
|
|
/* flags */
|
|
ngx_rtmp_mp4_field_8(b, 0);
|
|
|
|
|
|
/* DecoderConfig Descriptor */
|
|
|
|
ngx_rtmp_mp4_put_descr(b, 0x04, 15 + dsi_len);
|
|
|
|
/* objectTypeIndication: Audio ISO/IEC 14496-3 (AAC) */
|
|
ngx_rtmp_mp4_field_8(b, 0x40);
|
|
|
|
/* streamType: AudioStream */
|
|
ngx_rtmp_mp4_field_8(b, 0x15);
|
|
|
|
/* bufferSizeDB */
|
|
ngx_rtmp_mp4_field_24(b, 0);
|
|
|
|
/* maxBitrate */
|
|
ngx_rtmp_mp4_field_32(b, 0x0001F151);
|
|
|
|
/* avgBitrate */
|
|
ngx_rtmp_mp4_field_32(b, 0x0001F14D);
|
|
|
|
|
|
/* DecoderSpecificInfo Descriptor */
|
|
|
|
ngx_rtmp_mp4_put_descr(b, 0x05, dsi_len);
|
|
ngx_rtmp_mp4_data(b, dsi, dsi_len);
|
|
|
|
|
|
/* SL Descriptor */
|
|
|
|
ngx_rtmp_mp4_put_descr(b, 0x06, 1);
|
|
ngx_rtmp_mp4_field_8(b, 0x02);
|
|
|
|
ngx_rtmp_mp4_update_box_size(b, pos);
|
|
|
|
return NGX_OK;
|
|
}
|
|
|
|
|
|
static ngx_int_t
|
|
ngx_rtmp_mp4_write_audio(ngx_rtmp_session_t *s, ngx_buf_t *b)
|
|
{
|
|
u_char *pos;
|
|
ngx_rtmp_codec_ctx_t *codec_ctx;
|
|
|
|
codec_ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_codec_module);
|
|
|
|
pos = ngx_rtmp_mp4_start_box(b, "mp4a");
|
|
|
|
/* reserved */
|
|
ngx_rtmp_mp4_field_32(b, 0);
|
|
ngx_rtmp_mp4_field_16(b, 0);
|
|
|
|
/* data reference index */
|
|
ngx_rtmp_mp4_field_16(b, 1);
|
|
|
|
/* reserved */
|
|
ngx_rtmp_mp4_field_32(b, 0);
|
|
ngx_rtmp_mp4_field_32(b, 0);
|
|
|
|
/* channel count */
|
|
ngx_rtmp_mp4_field_16(b, (uint16_t) codec_ctx->audio_channels);
|
|
|
|
/* sample size */
|
|
ngx_rtmp_mp4_field_16(b, (uint16_t) (codec_ctx->sample_size * 8));
|
|
|
|
/* reserved */
|
|
ngx_rtmp_mp4_field_32(b, 0);
|
|
|
|
/* time scale */
|
|
ngx_rtmp_mp4_field_16(b, 1000);
|
|
|
|
/* sample rate */
|
|
ngx_rtmp_mp4_field_16(b, (uint16_t) codec_ctx->sample_rate);
|
|
|
|
ngx_rtmp_mp4_write_esds(s, b);
|
|
#if 0
|
|
/* tag size*/
|
|
ngx_rtmp_mp4_field_32(b, 8);
|
|
|
|
/* null tag */
|
|
ngx_rtmp_mp4_field_32(b, 0);
|
|
#endif
|
|
ngx_rtmp_mp4_update_box_size(b, pos);
|
|
|
|
return NGX_OK;
|
|
}
|
|
|
|
|
|
static ngx_int_t
|
|
ngx_rtmp_mp4_write_stsd(ngx_rtmp_session_t *s, ngx_buf_t *b,
|
|
ngx_rtmp_mp4_track_type_t ttype)
|
|
{
|
|
u_char *pos;
|
|
|
|
pos = ngx_rtmp_mp4_start_box(b, "stsd");
|
|
|
|
/* version & flags */
|
|
ngx_rtmp_mp4_field_32(b, 0);
|
|
|
|
/* entry count */
|
|
ngx_rtmp_mp4_field_32(b, 1);
|
|
|
|
if (ttype == NGX_RTMP_MP4_VIDEO_TRACK) {
|
|
ngx_rtmp_mp4_write_video(s, b);
|
|
} else {
|
|
ngx_rtmp_mp4_write_audio(s, b);
|
|
}
|
|
|
|
ngx_rtmp_mp4_update_box_size(b, pos);
|
|
|
|
return NGX_OK;
|
|
}
|
|
|
|
|
|
static ngx_int_t
|
|
ngx_rtmp_mp4_write_stts(ngx_buf_t *b)
|
|
{
|
|
u_char *pos;
|
|
|
|
pos = ngx_rtmp_mp4_start_box(b, "stts");
|
|
|
|
ngx_rtmp_mp4_field_32(b, 0); /* version */
|
|
ngx_rtmp_mp4_field_32(b, 0); /* entry count */
|
|
|
|
ngx_rtmp_mp4_update_box_size(b, pos);
|
|
|
|
return NGX_OK;
|
|
}
|
|
|
|
|
|
static ngx_int_t
|
|
ngx_rtmp_mp4_write_stsc(ngx_buf_t *b)
|
|
{
|
|
u_char *pos;
|
|
|
|
pos = ngx_rtmp_mp4_start_box(b, "stsc");
|
|
|
|
ngx_rtmp_mp4_field_32(b, 0); /* version */
|
|
ngx_rtmp_mp4_field_32(b, 0); /* entry count */
|
|
|
|
ngx_rtmp_mp4_update_box_size(b, pos);
|
|
|
|
return NGX_OK;
|
|
}
|
|
|
|
|
|
static ngx_int_t
|
|
ngx_rtmp_mp4_write_stsz(ngx_buf_t *b)
|
|
{
|
|
u_char *pos;
|
|
|
|
pos = ngx_rtmp_mp4_start_box(b, "stsz");
|
|
|
|
ngx_rtmp_mp4_field_32(b, 0); /* version */
|
|
ngx_rtmp_mp4_field_32(b, 0); /* entry count */
|
|
ngx_rtmp_mp4_field_32(b, 0); /* moar zeros */
|
|
|
|
ngx_rtmp_mp4_update_box_size(b, pos);
|
|
|
|
return NGX_OK;
|
|
}
|
|
|
|
|
|
static ngx_int_t
|
|
ngx_rtmp_mp4_write_stco(ngx_buf_t *b)
|
|
{
|
|
u_char *pos;
|
|
|
|
pos = ngx_rtmp_mp4_start_box(b, "stco");
|
|
|
|
ngx_rtmp_mp4_field_32(b, 0); /* version */
|
|
ngx_rtmp_mp4_field_32(b, 0); /* entry count */
|
|
|
|
ngx_rtmp_mp4_update_box_size(b, pos);
|
|
|
|
return NGX_OK;
|
|
}
|
|
|
|
|
|
static ngx_int_t
|
|
ngx_rtmp_mp4_write_stbl(ngx_rtmp_session_t *s, ngx_buf_t *b,
|
|
ngx_rtmp_mp4_track_type_t ttype)
|
|
{
|
|
u_char *pos;
|
|
|
|
pos = ngx_rtmp_mp4_start_box(b, "stbl");
|
|
|
|
ngx_rtmp_mp4_write_stsd(s, b, ttype);
|
|
ngx_rtmp_mp4_write_stts(b);
|
|
ngx_rtmp_mp4_write_stsc(b);
|
|
ngx_rtmp_mp4_write_stsz(b);
|
|
ngx_rtmp_mp4_write_stco(b);
|
|
|
|
ngx_rtmp_mp4_update_box_size(b, pos);
|
|
|
|
return NGX_OK;
|
|
}
|
|
|
|
|
|
static ngx_int_t
|
|
ngx_rtmp_mp4_write_minf(ngx_rtmp_session_t *s, ngx_buf_t *b,
|
|
ngx_rtmp_mp4_track_type_t ttype)
|
|
{
|
|
u_char *pos;
|
|
|
|
pos = ngx_rtmp_mp4_start_box(b, "minf");
|
|
|
|
if (ttype == NGX_RTMP_MP4_VIDEO_TRACK) {
|
|
ngx_rtmp_mp4_write_vmhd(b);
|
|
} else {
|
|
ngx_rtmp_mp4_write_smhd(b);
|
|
}
|
|
|
|
ngx_rtmp_mp4_write_dinf(b);
|
|
ngx_rtmp_mp4_write_stbl(s, b, ttype);
|
|
|
|
ngx_rtmp_mp4_update_box_size(b, pos);
|
|
|
|
return NGX_OK;
|
|
}
|
|
|
|
|
|
static ngx_int_t
|
|
ngx_rtmp_mp4_write_mdia(ngx_rtmp_session_t *s, ngx_buf_t *b,
|
|
ngx_rtmp_mp4_track_type_t ttype)
|
|
{
|
|
u_char *pos;
|
|
|
|
pos = ngx_rtmp_mp4_start_box(b, "mdia");
|
|
|
|
ngx_rtmp_mp4_write_mdhd(b);
|
|
ngx_rtmp_mp4_write_hdlr(b, ttype);
|
|
ngx_rtmp_mp4_write_minf(s, b, ttype);
|
|
|
|
ngx_rtmp_mp4_update_box_size(b, pos);
|
|
|
|
return NGX_OK;
|
|
}
|
|
|
|
static ngx_int_t
|
|
ngx_rtmp_mp4_write_trak(ngx_rtmp_session_t *s, ngx_buf_t *b,
|
|
ngx_rtmp_mp4_track_type_t ttype)
|
|
{
|
|
u_char *pos;
|
|
|
|
pos = ngx_rtmp_mp4_start_box(b, "trak");
|
|
|
|
ngx_rtmp_mp4_write_tkhd(s, b, ttype);
|
|
ngx_rtmp_mp4_write_mdia(s, b, ttype);
|
|
|
|
ngx_rtmp_mp4_update_box_size(b, pos);
|
|
|
|
return NGX_OK;
|
|
}
|
|
|
|
|
|
static ngx_int_t
|
|
ngx_rtmp_mp4_write_mvex(ngx_buf_t *b)
|
|
{
|
|
u_char *pos;
|
|
|
|
pos = ngx_rtmp_mp4_start_box(b, "mvex");
|
|
|
|
ngx_rtmp_mp4_field_32(b, 0x20);
|
|
|
|
ngx_rtmp_mp4_box(b, "trex");
|
|
|
|
/* version & flags */
|
|
ngx_rtmp_mp4_field_32(b, 0);
|
|
|
|
/* track id */
|
|
ngx_rtmp_mp4_field_32(b, 1);
|
|
|
|
/* default sample description index */
|
|
ngx_rtmp_mp4_field_32(b, 1);
|
|
|
|
/* default sample duration */
|
|
ngx_rtmp_mp4_field_32(b, 0);
|
|
|
|
/* default sample size, 1024 for AAC */
|
|
ngx_rtmp_mp4_field_32(b, 0);
|
|
|
|
/* default sample flags, key on */
|
|
ngx_rtmp_mp4_field_32(b, 0);
|
|
|
|
ngx_rtmp_mp4_update_box_size(b, pos);
|
|
|
|
return NGX_OK;
|
|
}
|
|
|
|
|
|
ngx_int_t
|
|
ngx_rtmp_mp4_write_moov(ngx_rtmp_session_t *s, ngx_buf_t *b,
|
|
ngx_rtmp_mp4_track_type_t ttype)
|
|
{
|
|
u_char *pos;
|
|
|
|
pos = ngx_rtmp_mp4_start_box(b, "moov");
|
|
|
|
ngx_rtmp_mp4_write_mvhd(b);
|
|
ngx_rtmp_mp4_write_mvex(b);
|
|
ngx_rtmp_mp4_write_trak(s, b, ttype);
|
|
|
|
ngx_rtmp_mp4_update_box_size(b, pos);
|
|
|
|
return NGX_OK;
|
|
}
|
|
|
|
|
|
static ngx_int_t
|
|
ngx_rtmp_mp4_write_tfhd(ngx_buf_t *b)
|
|
{
|
|
u_char *pos;
|
|
|
|
pos = ngx_rtmp_mp4_start_box(b, "tfhd");
|
|
|
|
/* version & flags */
|
|
ngx_rtmp_mp4_field_32(b, 0x00020000);
|
|
|
|
/* track id */
|
|
ngx_rtmp_mp4_field_32(b, 1);
|
|
|
|
ngx_rtmp_mp4_update_box_size(b, pos);
|
|
|
|
return NGX_OK;
|
|
}
|
|
|
|
|
|
static ngx_int_t
|
|
ngx_rtmp_mp4_write_tfdt(ngx_buf_t *b, uint32_t earliest_pres_time)
|
|
{
|
|
u_char *pos;
|
|
|
|
pos = ngx_rtmp_mp4_start_box(b, "tfdt");
|
|
|
|
/* version == 1 aka 64 bit integer */
|
|
ngx_rtmp_mp4_field_32(b, 0x00000000);
|
|
ngx_rtmp_mp4_field_32(b, earliest_pres_time);
|
|
|
|
ngx_rtmp_mp4_update_box_size(b, pos);
|
|
|
|
return NGX_OK;
|
|
}
|
|
|
|
|
|
static ngx_int_t
|
|
ngx_rtmp_mp4_write_trun(ngx_buf_t *b, uint32_t sample_count,
|
|
ngx_rtmp_mp4_sample_t *samples, ngx_uint_t sample_mask, u_char *moof_pos)
|
|
{
|
|
u_char *pos;
|
|
uint32_t i, offset, nitems, flags;
|
|
|
|
pos = ngx_rtmp_mp4_start_box(b, "trun");
|
|
|
|
nitems = 0;
|
|
|
|
/* data offset present */
|
|
flags = 0x01;
|
|
|
|
if (sample_mask & NGX_RTMP_MP4_SAMPLE_DURATION) {
|
|
nitems++;
|
|
flags |= 0x000100;
|
|
}
|
|
|
|
if (sample_mask & NGX_RTMP_MP4_SAMPLE_SIZE) {
|
|
nitems++;
|
|
flags |= 0x000200;
|
|
}
|
|
|
|
if (sample_mask & NGX_RTMP_MP4_SAMPLE_KEY) {
|
|
nitems++;
|
|
flags |= 0x000400;
|
|
}
|
|
|
|
if (sample_mask & NGX_RTMP_MP4_SAMPLE_DELAY) {
|
|
nitems++;
|
|
flags |= 0x000800;
|
|
}
|
|
|
|
offset = (pos - moof_pos) + 20 + (sample_count * nitems * 4) + 8;
|
|
|
|
ngx_rtmp_mp4_field_32(b, flags);
|
|
ngx_rtmp_mp4_field_32(b, sample_count);
|
|
ngx_rtmp_mp4_field_32(b, offset);
|
|
|
|
for (i = 0; i < sample_count; i++, samples++) {
|
|
|
|
if (sample_mask & NGX_RTMP_MP4_SAMPLE_DURATION) {
|
|
ngx_rtmp_mp4_field_32(b, samples->duration);
|
|
}
|
|
|
|
if (sample_mask & NGX_RTMP_MP4_SAMPLE_SIZE) {
|
|
ngx_rtmp_mp4_field_32(b, samples->size);
|
|
}
|
|
|
|
if (sample_mask & NGX_RTMP_MP4_SAMPLE_KEY) {
|
|
ngx_rtmp_mp4_field_32(b, samples->key ? 0x00000000 : 0x00010000);
|
|
}
|
|
|
|
if (sample_mask & NGX_RTMP_MP4_SAMPLE_DELAY) {
|
|
ngx_rtmp_mp4_field_32(b, samples->delay);
|
|
}
|
|
}
|
|
|
|
ngx_rtmp_mp4_update_box_size(b, pos);
|
|
|
|
return NGX_OK;
|
|
}
|
|
|
|
|
|
static ngx_int_t
|
|
ngx_rtmp_mp4_write_traf(ngx_buf_t *b, uint32_t earliest_pres_time,
|
|
uint32_t sample_count, ngx_rtmp_mp4_sample_t *samples,
|
|
ngx_uint_t sample_mask, u_char *moof_pos)
|
|
{
|
|
u_char *pos;
|
|
|
|
pos = ngx_rtmp_mp4_start_box(b, "traf");
|
|
|
|
ngx_rtmp_mp4_write_tfhd(b);
|
|
ngx_rtmp_mp4_write_tfdt(b, earliest_pres_time);
|
|
ngx_rtmp_mp4_write_trun(b, sample_count, samples, sample_mask, moof_pos);
|
|
|
|
ngx_rtmp_mp4_update_box_size(b, pos);
|
|
|
|
return NGX_OK;
|
|
}
|
|
|
|
|
|
static ngx_int_t
|
|
ngx_rtmp_mp4_write_mfhd(ngx_buf_t *b, uint32_t index)
|
|
{
|
|
u_char *pos;
|
|
|
|
pos = ngx_rtmp_mp4_start_box(b, "mfhd");
|
|
|
|
/* don't know what this is */
|
|
ngx_rtmp_mp4_field_32(b, 0);
|
|
|
|
/* fragment index. */
|
|
ngx_rtmp_mp4_field_32(b, index);
|
|
|
|
ngx_rtmp_mp4_update_box_size(b, pos);
|
|
|
|
return NGX_OK;
|
|
}
|
|
|
|
|
|
ngx_int_t
|
|
ngx_rtmp_mp4_write_sidx(ngx_buf_t *b, ngx_uint_t reference_size,
|
|
uint32_t earliest_pres_time, uint32_t latest_pres_time)
|
|
{
|
|
u_char *pos;
|
|
uint32_t duration;
|
|
|
|
duration = latest_pres_time - earliest_pres_time;
|
|
|
|
pos = ngx_rtmp_mp4_start_box(b, "sidx");
|
|
|
|
/* version */
|
|
ngx_rtmp_mp4_field_32(b, 0);
|
|
|
|
/* reference id */
|
|
ngx_rtmp_mp4_field_32(b, 1);
|
|
|
|
/* timescale */
|
|
ngx_rtmp_mp4_field_32(b, 1000);
|
|
|
|
/* earliest presentation time */
|
|
ngx_rtmp_mp4_field_32(b, earliest_pres_time);
|
|
|
|
/* first offset */
|
|
ngx_rtmp_mp4_field_32(b, duration); /*TODO*/
|
|
|
|
/* reserved */
|
|
ngx_rtmp_mp4_field_16(b, 0);
|
|
|
|
/* reference count = 1 */
|
|
ngx_rtmp_mp4_field_16(b, 1);
|
|
|
|
/* 1st bit is reference type, the rest is reference size */
|
|
ngx_rtmp_mp4_field_32(b, reference_size);
|
|
|
|
/* subsegment duration */
|
|
ngx_rtmp_mp4_field_32(b, duration);
|
|
|
|
/* first bit is startsWithSAP (=1), next 3 bits are SAP type (=001) */
|
|
ngx_rtmp_mp4_field_8(b, 0x90);
|
|
|
|
/* SAP delta time */
|
|
ngx_rtmp_mp4_field_24(b, 0);
|
|
|
|
ngx_rtmp_mp4_update_box_size(b, pos);
|
|
|
|
return NGX_OK;
|
|
}
|
|
|
|
|
|
ngx_int_t
|
|
ngx_rtmp_mp4_write_moof(ngx_buf_t *b, uint32_t earliest_pres_time,
|
|
uint32_t sample_count, ngx_rtmp_mp4_sample_t *samples,
|
|
ngx_uint_t sample_mask, uint32_t index)
|
|
{
|
|
u_char *pos;
|
|
|
|
pos = ngx_rtmp_mp4_start_box(b, "moof");
|
|
|
|
ngx_rtmp_mp4_write_mfhd(b, index);
|
|
ngx_rtmp_mp4_write_traf(b, earliest_pres_time, sample_count, samples,
|
|
sample_mask, pos);
|
|
|
|
ngx_rtmp_mp4_update_box_size(b, pos);
|
|
|
|
return NGX_OK;
|
|
}
|
|
|
|
|
|
ngx_uint_t
|
|
ngx_rtmp_mp4_write_mdat(ngx_buf_t *b, ngx_uint_t size)
|
|
{
|
|
ngx_rtmp_mp4_field_32(b, size);
|
|
|
|
ngx_rtmp_mp4_box(b, "mdat");
|
|
|
|
return NGX_OK;
|
|
}
|
|
|