/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include #include #include #define NGX_HTTP_MP4_TRAK_ATOM 0 #define NGX_HTTP_MP4_TKHD_ATOM 1 #define NGX_HTTP_MP4_MDIA_ATOM 2 #define NGX_HTTP_MP4_MDHD_ATOM 3 #define NGX_HTTP_MP4_HDLR_ATOM 4 #define NGX_HTTP_MP4_MINF_ATOM 5 #define NGX_HTTP_MP4_VMHD_ATOM 6 #define NGX_HTTP_MP4_SMHD_ATOM 7 #define NGX_HTTP_MP4_DINF_ATOM 8 #define NGX_HTTP_MP4_STBL_ATOM 9 #define NGX_HTTP_MP4_STSD_ATOM 10 #define NGX_HTTP_MP4_STTS_ATOM 11 #define NGX_HTTP_MP4_STTS_DATA 12 #define NGX_HTTP_MP4_STSS_ATOM 13 #define NGX_HTTP_MP4_STSS_DATA 14 #define NGX_HTTP_MP4_CTTS_ATOM 15 #define NGX_HTTP_MP4_CTTS_DATA 16 #define NGX_HTTP_MP4_STSC_ATOM 17 #define NGX_HTTP_MP4_STSC_START 18 #define NGX_HTTP_MP4_STSC_DATA 19 #define NGX_HTTP_MP4_STSC_END 20 #define NGX_HTTP_MP4_STSZ_ATOM 21 #define NGX_HTTP_MP4_STSZ_DATA 22 #define NGX_HTTP_MP4_STCO_ATOM 23 #define NGX_HTTP_MP4_STCO_DATA 24 #define NGX_HTTP_MP4_CO64_ATOM 25 #define NGX_HTTP_MP4_CO64_DATA 26 #define NGX_HTTP_MP4_LAST_ATOM NGX_HTTP_MP4_CO64_DATA typedef struct { size_t buffer_size; size_t max_buffer_size; } ngx_http_mp4_conf_t; typedef struct { u_char chunk[4]; u_char samples[4]; u_char id[4]; } ngx_mp4_stsc_entry_t; typedef struct { uint32_t timescale; uint32_t time_to_sample_entries; uint32_t sample_to_chunk_entries; uint32_t sync_samples_entries; uint32_t composition_offset_entries; uint32_t sample_sizes_entries; uint32_t chunks; ngx_uint_t start_sample; ngx_uint_t end_sample; ngx_uint_t start_chunk; ngx_uint_t end_chunk; ngx_uint_t start_chunk_samples; ngx_uint_t end_chunk_samples; uint64_t start_chunk_samples_size; uint64_t end_chunk_samples_size; off_t start_offset; off_t end_offset; size_t tkhd_size; size_t mdhd_size; size_t hdlr_size; size_t vmhd_size; size_t smhd_size; size_t dinf_size; size_t size; ngx_chain_t out[NGX_HTTP_MP4_LAST_ATOM + 1]; ngx_buf_t trak_atom_buf; ngx_buf_t tkhd_atom_buf; ngx_buf_t mdia_atom_buf; ngx_buf_t mdhd_atom_buf; ngx_buf_t hdlr_atom_buf; ngx_buf_t minf_atom_buf; ngx_buf_t vmhd_atom_buf; ngx_buf_t smhd_atom_buf; ngx_buf_t dinf_atom_buf; ngx_buf_t stbl_atom_buf; ngx_buf_t stsd_atom_buf; ngx_buf_t stts_atom_buf; ngx_buf_t stts_data_buf; ngx_buf_t stss_atom_buf; ngx_buf_t stss_data_buf; ngx_buf_t ctts_atom_buf; ngx_buf_t ctts_data_buf; ngx_buf_t stsc_atom_buf; ngx_buf_t stsc_start_chunk_buf; ngx_buf_t stsc_end_chunk_buf; ngx_buf_t stsc_data_buf; ngx_buf_t stsz_atom_buf; ngx_buf_t stsz_data_buf; ngx_buf_t stco_atom_buf; ngx_buf_t stco_data_buf; ngx_buf_t co64_atom_buf; ngx_buf_t co64_data_buf; ngx_mp4_stsc_entry_t stsc_start_chunk_entry; ngx_mp4_stsc_entry_t stsc_end_chunk_entry; } ngx_http_mp4_trak_t; typedef struct { ngx_file_t file; u_char *buffer; u_char *buffer_start; u_char *buffer_pos; u_char *buffer_end; size_t buffer_size; off_t offset; off_t end; off_t content_length; ngx_uint_t start; ngx_uint_t length; uint32_t timescale; ngx_http_request_t *request; ngx_array_t trak; ngx_http_mp4_trak_t traks[2]; size_t ftyp_size; size_t moov_size; ngx_chain_t *out; ngx_chain_t ftyp_atom; ngx_chain_t moov_atom; ngx_chain_t mvhd_atom; ngx_chain_t mdat_atom; ngx_chain_t mdat_data; ngx_buf_t ftyp_atom_buf; ngx_buf_t moov_atom_buf; ngx_buf_t mvhd_atom_buf; ngx_buf_t mdat_atom_buf; ngx_buf_t mdat_data_buf; u_char moov_atom_header[8]; u_char mdat_atom_header[16]; } ngx_http_mp4_file_t; typedef struct { char *name; ngx_int_t (*handler)(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size); } ngx_http_mp4_atom_handler_t; #define ngx_mp4_atom_header(mp4) (mp4->buffer_pos - 8) #define ngx_mp4_atom_data(mp4) mp4->buffer_pos #define ngx_mp4_atom_data_size(t) (uint64_t) (sizeof(t) - 8) #define ngx_mp4_atom_next(mp4, n) \ mp4->buffer_pos += (size_t) n; \ mp4->offset += n #define ngx_mp4_set_atom_name(p, n1, n2, n3, n4) \ ((u_char *) (p))[4] = n1; \ ((u_char *) (p))[5] = n2; \ ((u_char *) (p))[6] = n3; \ ((u_char *) (p))[7] = n4 #define ngx_mp4_get_32value(p) \ ( ((uint32_t) ((u_char *) (p))[0] << 24) \ + ( ((u_char *) (p))[1] << 16) \ + ( ((u_char *) (p))[2] << 8) \ + ( ((u_char *) (p))[3]) ) #define ngx_mp4_set_32value(p, n) \ ((u_char *) (p))[0] = (u_char) ((n) >> 24); \ ((u_char *) (p))[1] = (u_char) ((n) >> 16); \ ((u_char *) (p))[2] = (u_char) ((n) >> 8); \ ((u_char *) (p))[3] = (u_char) (n) #define ngx_mp4_get_64value(p) \ ( ((uint64_t) ((u_char *) (p))[0] << 56) \ + ((uint64_t) ((u_char *) (p))[1] << 48) \ + ((uint64_t) ((u_char *) (p))[2] << 40) \ + ((uint64_t) ((u_char *) (p))[3] << 32) \ + ((uint64_t) ((u_char *) (p))[4] << 24) \ + ( ((u_char *) (p))[5] << 16) \ + ( ((u_char *) (p))[6] << 8) \ + ( ((u_char *) (p))[7]) ) #define ngx_mp4_set_64value(p, n) \ ((u_char *) (p))[0] = (u_char) ((uint64_t) (n) >> 56); \ ((u_char *) (p))[1] = (u_char) ((uint64_t) (n) >> 48); \ ((u_char *) (p))[2] = (u_char) ((uint64_t) (n) >> 40); \ ((u_char *) (p))[3] = (u_char) ((uint64_t) (n) >> 32); \ ((u_char *) (p))[4] = (u_char) ( (n) >> 24); \ ((u_char *) (p))[5] = (u_char) ( (n) >> 16); \ ((u_char *) (p))[6] = (u_char) ( (n) >> 8); \ ((u_char *) (p))[7] = (u_char) (n) #define ngx_mp4_last_trak(mp4) \ &((ngx_http_mp4_trak_t *) mp4->trak.elts)[mp4->trak.nelts - 1] static ngx_int_t ngx_http_mp4_handler(ngx_http_request_t *r); static ngx_int_t ngx_http_mp4_process(ngx_http_mp4_file_t *mp4); static ngx_int_t ngx_http_mp4_read_atom(ngx_http_mp4_file_t *mp4, ngx_http_mp4_atom_handler_t *atom, uint64_t atom_data_size); static ngx_int_t ngx_http_mp4_read(ngx_http_mp4_file_t *mp4, size_t size); static ngx_int_t ngx_http_mp4_read_ftyp_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size); static ngx_int_t ngx_http_mp4_read_moov_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size); static ngx_int_t ngx_http_mp4_read_mdat_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size); static size_t ngx_http_mp4_update_mdat_atom(ngx_http_mp4_file_t *mp4, off_t start_offset, off_t end_offset); static ngx_int_t ngx_http_mp4_read_mvhd_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size); static ngx_int_t ngx_http_mp4_read_trak_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size); static void ngx_http_mp4_update_trak_atom(ngx_http_mp4_file_t *mp4, ngx_http_mp4_trak_t *trak); static ngx_int_t ngx_http_mp4_read_cmov_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size); static ngx_int_t ngx_http_mp4_read_tkhd_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size); static ngx_int_t ngx_http_mp4_read_mdia_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size); static void ngx_http_mp4_update_mdia_atom(ngx_http_mp4_file_t *mp4, ngx_http_mp4_trak_t *trak); static ngx_int_t ngx_http_mp4_read_mdhd_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size); static ngx_int_t ngx_http_mp4_read_hdlr_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size); static ngx_int_t ngx_http_mp4_read_minf_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size); static void ngx_http_mp4_update_minf_atom(ngx_http_mp4_file_t *mp4, ngx_http_mp4_trak_t *trak); static ngx_int_t ngx_http_mp4_read_dinf_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size); static ngx_int_t ngx_http_mp4_read_vmhd_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size); static ngx_int_t ngx_http_mp4_read_smhd_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size); static ngx_int_t ngx_http_mp4_read_stbl_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size); static void ngx_http_mp4_update_stbl_atom(ngx_http_mp4_file_t *mp4, ngx_http_mp4_trak_t *trak); static ngx_int_t ngx_http_mp4_read_stsd_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size); static ngx_int_t ngx_http_mp4_read_stts_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size); static ngx_int_t ngx_http_mp4_update_stts_atom(ngx_http_mp4_file_t *mp4, ngx_http_mp4_trak_t *trak); static ngx_int_t ngx_http_mp4_crop_stts_data(ngx_http_mp4_file_t *mp4, ngx_http_mp4_trak_t *trak, ngx_uint_t start); static ngx_int_t ngx_http_mp4_read_stss_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size); static ngx_int_t ngx_http_mp4_update_stss_atom(ngx_http_mp4_file_t *mp4, ngx_http_mp4_trak_t *trak); static void ngx_http_mp4_crop_stss_data(ngx_http_mp4_file_t *mp4, ngx_http_mp4_trak_t *trak, ngx_uint_t start); static ngx_int_t ngx_http_mp4_read_ctts_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size); static void ngx_http_mp4_update_ctts_atom(ngx_http_mp4_file_t *mp4, ngx_http_mp4_trak_t *trak); static void ngx_http_mp4_crop_ctts_data(ngx_http_mp4_file_t *mp4, ngx_http_mp4_trak_t *trak, ngx_uint_t start); static ngx_int_t ngx_http_mp4_read_stsc_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size); static ngx_int_t ngx_http_mp4_update_stsc_atom(ngx_http_mp4_file_t *mp4, ngx_http_mp4_trak_t *trak); static ngx_int_t ngx_http_mp4_crop_stsc_data(ngx_http_mp4_file_t *mp4, ngx_http_mp4_trak_t *trak, ngx_uint_t start); static ngx_int_t ngx_http_mp4_read_stsz_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size); static ngx_int_t ngx_http_mp4_update_stsz_atom(ngx_http_mp4_file_t *mp4, ngx_http_mp4_trak_t *trak); static ngx_int_t ngx_http_mp4_read_stco_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size); static ngx_int_t ngx_http_mp4_update_stco_atom(ngx_http_mp4_file_t *mp4, ngx_http_mp4_trak_t *trak); static void ngx_http_mp4_adjust_stco_atom(ngx_http_mp4_file_t *mp4, ngx_http_mp4_trak_t *trak, int32_t adjustment); static ngx_int_t ngx_http_mp4_read_co64_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size); static ngx_int_t ngx_http_mp4_update_co64_atom(ngx_http_mp4_file_t *mp4, ngx_http_mp4_trak_t *trak); static void ngx_http_mp4_adjust_co64_atom(ngx_http_mp4_file_t *mp4, ngx_http_mp4_trak_t *trak, off_t adjustment); static char *ngx_http_mp4(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static void *ngx_http_mp4_create_conf(ngx_conf_t *cf); static char *ngx_http_mp4_merge_conf(ngx_conf_t *cf, void *parent, void *child); static ngx_command_t ngx_http_mp4_commands[] = { { ngx_string("mp4"), NGX_HTTP_LOC_CONF|NGX_CONF_NOARGS, ngx_http_mp4, 0, 0, NULL }, { ngx_string("mp4_buffer_size"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, ngx_conf_set_size_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_mp4_conf_t, buffer_size), NULL }, { ngx_string("mp4_max_buffer_size"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, ngx_conf_set_size_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_mp4_conf_t, max_buffer_size), NULL }, ngx_null_command }; static ngx_http_module_t ngx_http_mp4_module_ctx = { NULL, /* preconfiguration */ NULL, /* postconfiguration */ NULL, /* create main configuration */ NULL, /* init main configuration */ NULL, /* create server configuration */ NULL, /* merge server configuration */ ngx_http_mp4_create_conf, /* create location configuration */ ngx_http_mp4_merge_conf /* merge location configuration */ }; ngx_module_t ngx_http_mp4_module = { NGX_MODULE_V1, &ngx_http_mp4_module_ctx, /* module context */ ngx_http_mp4_commands, /* module directives */ NGX_HTTP_MODULE, /* module type */ NULL, /* init master */ NULL, /* init module */ NULL, /* init process */ NULL, /* init thread */ NULL, /* exit thread */ NULL, /* exit process */ NULL, /* exit master */ NGX_MODULE_V1_PADDING }; static ngx_http_mp4_atom_handler_t ngx_http_mp4_atoms[] = { { "ftyp", ngx_http_mp4_read_ftyp_atom }, { "moov", ngx_http_mp4_read_moov_atom }, { "mdat", ngx_http_mp4_read_mdat_atom }, { NULL, NULL } }; static ngx_http_mp4_atom_handler_t ngx_http_mp4_moov_atoms[] = { { "mvhd", ngx_http_mp4_read_mvhd_atom }, { "trak", ngx_http_mp4_read_trak_atom }, { "cmov", ngx_http_mp4_read_cmov_atom }, { NULL, NULL } }; static ngx_http_mp4_atom_handler_t ngx_http_mp4_trak_atoms[] = { { "tkhd", ngx_http_mp4_read_tkhd_atom }, { "mdia", ngx_http_mp4_read_mdia_atom }, { NULL, NULL } }; static ngx_http_mp4_atom_handler_t ngx_http_mp4_mdia_atoms[] = { { "mdhd", ngx_http_mp4_read_mdhd_atom }, { "hdlr", ngx_http_mp4_read_hdlr_atom }, { "minf", ngx_http_mp4_read_minf_atom }, { NULL, NULL } }; static ngx_http_mp4_atom_handler_t ngx_http_mp4_minf_atoms[] = { { "vmhd", ngx_http_mp4_read_vmhd_atom }, { "smhd", ngx_http_mp4_read_smhd_atom }, { "dinf", ngx_http_mp4_read_dinf_atom }, { "stbl", ngx_http_mp4_read_stbl_atom }, { NULL, NULL } }; static ngx_http_mp4_atom_handler_t ngx_http_mp4_stbl_atoms[] = { { "stsd", ngx_http_mp4_read_stsd_atom }, { "stts", ngx_http_mp4_read_stts_atom }, { "stss", ngx_http_mp4_read_stss_atom }, { "ctts", ngx_http_mp4_read_ctts_atom }, { "stsc", ngx_http_mp4_read_stsc_atom }, { "stsz", ngx_http_mp4_read_stsz_atom }, { "stco", ngx_http_mp4_read_stco_atom }, { "co64", ngx_http_mp4_read_co64_atom }, { NULL, NULL } }; static ngx_int_t ngx_http_mp4_handler(ngx_http_request_t *r) { u_char *last; size_t root; ngx_int_t rc, start, end; ngx_uint_t level, length; ngx_str_t path, value; ngx_log_t *log; ngx_buf_t *b; ngx_chain_t out; ngx_http_mp4_file_t *mp4; ngx_open_file_info_t of; ngx_http_core_loc_conf_t *clcf; if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD))) { return NGX_HTTP_NOT_ALLOWED; } if (r->uri.data[r->uri.len - 1] == '/') { return NGX_DECLINED; } rc = ngx_http_discard_request_body(r); if (rc != NGX_OK) { return rc; } last = ngx_http_map_uri_to_path(r, &path, &root, 0); if (last == NULL) { return NGX_HTTP_INTERNAL_SERVER_ERROR; } log = r->connection->log; path.len = last - path.data; ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0, "http mp4 filename: \"%V\"", &path); clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); ngx_memzero(&of, sizeof(ngx_open_file_info_t)); of.read_ahead = clcf->read_ahead; of.directio = NGX_MAX_OFF_T_VALUE; of.valid = clcf->open_file_cache_valid; of.min_uses = clcf->open_file_cache_min_uses; of.errors = clcf->open_file_cache_errors; of.events = clcf->open_file_cache_events; if (ngx_http_set_disable_symlinks(r, clcf, &path, &of) != NGX_OK) { return NGX_HTTP_INTERNAL_SERVER_ERROR; } if (ngx_open_cached_file(clcf->open_file_cache, &path, &of, r->pool) != NGX_OK) { switch (of.err) { case 0: return NGX_HTTP_INTERNAL_SERVER_ERROR; case NGX_ENOENT: case NGX_ENOTDIR: case NGX_ENAMETOOLONG: level = NGX_LOG_ERR; rc = NGX_HTTP_NOT_FOUND; break; case NGX_EACCES: #if (NGX_HAVE_OPENAT) case NGX_EMLINK: case NGX_ELOOP: #endif level = NGX_LOG_ERR; rc = NGX_HTTP_FORBIDDEN; break; default: level = NGX_LOG_CRIT; rc = NGX_HTTP_INTERNAL_SERVER_ERROR; break; } if (rc != NGX_HTTP_NOT_FOUND || clcf->log_not_found) { ngx_log_error(level, log, of.err, "%s \"%s\" failed", of.failed, path.data); } return rc; } if (!of.is_file) { if (ngx_close_file(of.fd) == NGX_FILE_ERROR) { ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, ngx_close_file_n " \"%s\" failed", path.data); } return NGX_DECLINED; } r->root_tested = !r->error_page; r->allow_ranges = 1; start = -1; length = 0; r->headers_out.content_length_n = of.size; mp4 = NULL; b = NULL; if (r->args.len) { if (ngx_http_arg(r, (u_char *) "start", 5, &value) == NGX_OK) { /* * A Flash player may send start value with a lot of digits * after dot so strtod() is used instead of atofp(). NaNs and * infinities become negative numbers after (int) conversion. */ ngx_set_errno(0); start = (int) (strtod((char *) value.data, NULL) * 1000); if (ngx_errno != 0) { start = -1; } } if (ngx_http_arg(r, (u_char *) "end", 3, &value) == NGX_OK) { ngx_set_errno(0); end = (int) (strtod((char *) value.data, NULL) * 1000); if (ngx_errno != 0) { end = -1; } if (end > 0) { if (start < 0) { start = 0; } if (end > start) { length = end - start; } } } } if (start >= 0) { r->single_range = 1; mp4 = ngx_pcalloc(r->pool, sizeof(ngx_http_mp4_file_t)); if (mp4 == NULL) { return NGX_HTTP_INTERNAL_SERVER_ERROR; } mp4->file.fd = of.fd; mp4->file.name = path; mp4->file.log = r->connection->log; mp4->end = of.size; mp4->start = (ngx_uint_t) start; mp4->length = length; mp4->request = r; switch (ngx_http_mp4_process(mp4)) { case NGX_DECLINED: if (mp4->buffer) { ngx_pfree(r->pool, mp4->buffer); } ngx_pfree(r->pool, mp4); mp4 = NULL; break; case NGX_OK: r->headers_out.content_length_n = mp4->content_length; break; default: /* NGX_ERROR */ if (mp4->buffer) { ngx_pfree(r->pool, mp4->buffer); } ngx_pfree(r->pool, mp4); return NGX_HTTP_INTERNAL_SERVER_ERROR; } } log->action = "sending mp4 to client"; if (clcf->directio <= of.size) { /* * DIRECTIO is set on transfer only * to allow kernel to cache "moov" atom */ if (ngx_directio_on(of.fd) == NGX_FILE_ERROR) { ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, ngx_directio_on_n " \"%s\" failed", path.data); } of.is_directio = 1; if (mp4) { mp4->file.directio = 1; } } r->headers_out.status = NGX_HTTP_OK; r->headers_out.last_modified_time = of.mtime; if (ngx_http_set_etag(r) != NGX_OK) { return NGX_HTTP_INTERNAL_SERVER_ERROR; } if (ngx_http_set_content_type(r) != NGX_OK) { return NGX_HTTP_INTERNAL_SERVER_ERROR; } if (mp4 == NULL) { b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t)); if (b == NULL) { return NGX_HTTP_INTERNAL_SERVER_ERROR; } b->file = ngx_pcalloc(r->pool, sizeof(ngx_file_t)); if (b->file == NULL) { return NGX_HTTP_INTERNAL_SERVER_ERROR; } } rc = ngx_http_send_header(r); if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) { return rc; } if (mp4) { return ngx_http_output_filter(r, mp4->out); } b->file_pos = 0; b->file_last = of.size; b->in_file = b->file_last ? 1 : 0; b->last_buf = (r == r->main) ? 1 : 0; b->last_in_chain = 1; b->file->fd = of.fd; b->file->name = path; b->file->log = log; b->file->directio = of.is_directio; out.buf = b; out.next = NULL; return ngx_http_output_filter(r, &out); } static ngx_int_t ngx_http_mp4_process(ngx_http_mp4_file_t *mp4) { off_t start_offset, end_offset, adjustment; ngx_int_t rc; ngx_uint_t i, j; ngx_chain_t **prev; ngx_http_mp4_trak_t *trak; ngx_http_mp4_conf_t *conf; ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 start:%ui, length:%ui", mp4->start, mp4->length); conf = ngx_http_get_module_loc_conf(mp4->request, ngx_http_mp4_module); mp4->buffer_size = conf->buffer_size; rc = ngx_http_mp4_read_atom(mp4, ngx_http_mp4_atoms, mp4->end); if (rc != NGX_OK) { return rc; } if (mp4->trak.nelts == 0) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "no mp4 trak atoms were found in \"%s\"", mp4->file.name.data); return NGX_ERROR; } if (mp4->mdat_atom.buf == NULL) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "no mp4 mdat atom was found in \"%s\"", mp4->file.name.data); return NGX_ERROR; } prev = &mp4->out; if (mp4->ftyp_atom.buf) { *prev = &mp4->ftyp_atom; prev = &mp4->ftyp_atom.next; } *prev = &mp4->moov_atom; prev = &mp4->moov_atom.next; if (mp4->mvhd_atom.buf) { mp4->moov_size += mp4->mvhd_atom_buf.last - mp4->mvhd_atom_buf.pos; *prev = &mp4->mvhd_atom; prev = &mp4->mvhd_atom.next; } start_offset = mp4->end; end_offset = 0; trak = mp4->trak.elts; for (i = 0; i < mp4->trak.nelts; i++) { if (ngx_http_mp4_update_stts_atom(mp4, &trak[i]) != NGX_OK) { return NGX_ERROR; } if (ngx_http_mp4_update_stss_atom(mp4, &trak[i]) != NGX_OK) { return NGX_ERROR; } ngx_http_mp4_update_ctts_atom(mp4, &trak[i]); if (ngx_http_mp4_update_stsc_atom(mp4, &trak[i]) != NGX_OK) { return NGX_ERROR; } if (ngx_http_mp4_update_stsz_atom(mp4, &trak[i]) != NGX_OK) { return NGX_ERROR; } if (trak[i].out[NGX_HTTP_MP4_CO64_DATA].buf) { if (ngx_http_mp4_update_co64_atom(mp4, &trak[i]) != NGX_OK) { return NGX_ERROR; } } else { if (ngx_http_mp4_update_stco_atom(mp4, &trak[i]) != NGX_OK) { return NGX_ERROR; } } ngx_http_mp4_update_stbl_atom(mp4, &trak[i]); ngx_http_mp4_update_minf_atom(mp4, &trak[i]); trak[i].size += trak[i].mdhd_size; trak[i].size += trak[i].hdlr_size; ngx_http_mp4_update_mdia_atom(mp4, &trak[i]); trak[i].size += trak[i].tkhd_size; ngx_http_mp4_update_trak_atom(mp4, &trak[i]); mp4->moov_size += trak[i].size; if (start_offset > trak[i].start_offset) { start_offset = trak[i].start_offset; } if (end_offset < trak[i].end_offset) { end_offset = trak[i].end_offset; } *prev = &trak[i].out[NGX_HTTP_MP4_TRAK_ATOM]; prev = &trak[i].out[NGX_HTTP_MP4_TRAK_ATOM].next; for (j = 0; j < NGX_HTTP_MP4_LAST_ATOM + 1; j++) { if (trak[i].out[j].buf) { *prev = &trak[i].out[j]; prev = &trak[i].out[j].next; } } } if (end_offset < start_offset) { end_offset = start_offset; } mp4->moov_size += 8; ngx_mp4_set_32value(mp4->moov_atom_header, mp4->moov_size); ngx_mp4_set_atom_name(mp4->moov_atom_header, 'm', 'o', 'o', 'v'); mp4->content_length += mp4->moov_size; *prev = &mp4->mdat_atom; if (start_offset > mp4->mdat_data.buf->file_last) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "start time is out mp4 mdat atom in \"%s\"", mp4->file.name.data); return NGX_ERROR; } adjustment = mp4->ftyp_size + mp4->moov_size + ngx_http_mp4_update_mdat_atom(mp4, start_offset, end_offset) - start_offset; ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 adjustment:%O", adjustment); for (i = 0; i < mp4->trak.nelts; i++) { if (trak[i].out[NGX_HTTP_MP4_CO64_DATA].buf) { ngx_http_mp4_adjust_co64_atom(mp4, &trak[i], adjustment); } else { ngx_http_mp4_adjust_stco_atom(mp4, &trak[i], (int32_t) adjustment); } } return NGX_OK; } typedef struct { u_char size[4]; u_char name[4]; } ngx_mp4_atom_header_t; typedef struct { u_char size[4]; u_char name[4]; u_char size64[8]; } ngx_mp4_atom_header64_t; static ngx_int_t ngx_http_mp4_read_atom(ngx_http_mp4_file_t *mp4, ngx_http_mp4_atom_handler_t *atom, uint64_t atom_data_size) { off_t end; size_t atom_header_size; u_char *atom_header, *atom_name; uint64_t atom_size; ngx_int_t rc; ngx_uint_t n; end = mp4->offset + atom_data_size; while (mp4->offset < end) { if (ngx_http_mp4_read(mp4, sizeof(uint32_t)) != NGX_OK) { return NGX_ERROR; } atom_header = mp4->buffer_pos; atom_size = ngx_mp4_get_32value(atom_header); atom_header_size = sizeof(ngx_mp4_atom_header_t); if (atom_size == 0) { ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 atom end"); return NGX_OK; } if (atom_size < sizeof(ngx_mp4_atom_header_t)) { if (atom_size == 1) { if (ngx_http_mp4_read(mp4, sizeof(ngx_mp4_atom_header64_t)) != NGX_OK) { return NGX_ERROR; } /* 64-bit atom size */ atom_header = mp4->buffer_pos; atom_size = ngx_mp4_get_64value(atom_header + 8); atom_header_size = sizeof(ngx_mp4_atom_header64_t); } else { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "\"%s\" mp4 atom is too small:%uL", mp4->file.name.data, atom_size); return NGX_ERROR; } } if (ngx_http_mp4_read(mp4, sizeof(ngx_mp4_atom_header_t)) != NGX_OK) { return NGX_ERROR; } atom_header = mp4->buffer_pos; atom_name = atom_header + sizeof(uint32_t); ngx_log_debug4(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 atom: %*s @%O:%uL", (size_t) 4, atom_name, mp4->offset, atom_size); if (atom_size > (uint64_t) (NGX_MAX_OFF_T_VALUE - mp4->offset) || mp4->offset + (off_t) atom_size > end) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "\"%s\" mp4 atom too large:%uL", mp4->file.name.data, atom_size); return NGX_ERROR; } for (n = 0; atom[n].name; n++) { if (ngx_strncmp(atom_name, atom[n].name, 4) == 0) { ngx_mp4_atom_next(mp4, atom_header_size); rc = atom[n].handler(mp4, atom_size - atom_header_size); if (rc != NGX_OK) { return rc; } goto next; } } ngx_mp4_atom_next(mp4, atom_size); next: continue; } return NGX_OK; } static ngx_int_t ngx_http_mp4_read(ngx_http_mp4_file_t *mp4, size_t size) { ssize_t n; if (mp4->buffer_pos + size <= mp4->buffer_end) { return NGX_OK; } if (mp4->offset + (off_t) mp4->buffer_size > mp4->end) { mp4->buffer_size = (size_t) (mp4->end - mp4->offset); } if (mp4->buffer_size < size) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "\"%s\" mp4 file truncated", mp4->file.name.data); return NGX_ERROR; } if (mp4->buffer == NULL) { mp4->buffer = ngx_palloc(mp4->request->pool, mp4->buffer_size); if (mp4->buffer == NULL) { return NGX_ERROR; } mp4->buffer_start = mp4->buffer; } n = ngx_read_file(&mp4->file, mp4->buffer_start, mp4->buffer_size, mp4->offset); if (n == NGX_ERROR) { return NGX_ERROR; } if ((size_t) n != mp4->buffer_size) { ngx_log_error(NGX_LOG_CRIT, mp4->file.log, 0, ngx_read_file_n " read only %z of %z from \"%s\"", n, mp4->buffer_size, mp4->file.name.data); return NGX_ERROR; } mp4->buffer_pos = mp4->buffer_start; mp4->buffer_end = mp4->buffer_start + mp4->buffer_size; return NGX_OK; } static ngx_int_t ngx_http_mp4_read_ftyp_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size) { u_char *ftyp_atom; size_t atom_size; ngx_buf_t *atom; ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 ftyp atom"); if (atom_data_size > 1024 || ngx_mp4_atom_data(mp4) + (size_t) atom_data_size > mp4->buffer_end) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "\"%s\" mp4 ftyp atom is too large:%uL", mp4->file.name.data, atom_data_size); return NGX_ERROR; } atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size; ftyp_atom = ngx_palloc(mp4->request->pool, atom_size); if (ftyp_atom == NULL) { return NGX_ERROR; } ngx_mp4_set_32value(ftyp_atom, atom_size); ngx_mp4_set_atom_name(ftyp_atom, 'f', 't', 'y', 'p'); /* * only moov atom content is guaranteed to be in mp4->buffer * during sending response, so ftyp atom content should be copied */ ngx_memcpy(ftyp_atom + sizeof(ngx_mp4_atom_header_t), ngx_mp4_atom_data(mp4), (size_t) atom_data_size); atom = &mp4->ftyp_atom_buf; atom->temporary = 1; atom->pos = ftyp_atom; atom->last = ftyp_atom + atom_size; mp4->ftyp_atom.buf = atom; mp4->ftyp_size = atom_size; mp4->content_length = atom_size; ngx_mp4_atom_next(mp4, atom_data_size); return NGX_OK; } /* * Small excess buffer to process atoms after moov atom, mp4->buffer_start * will be set to this buffer part after moov atom processing. */ #define NGX_HTTP_MP4_MOOV_BUFFER_EXCESS (4 * 1024) static ngx_int_t ngx_http_mp4_read_moov_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size) { ngx_int_t rc; ngx_uint_t no_mdat; ngx_buf_t *atom; ngx_http_mp4_conf_t *conf; ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 moov atom"); no_mdat = (mp4->mdat_atom.buf == NULL); if (no_mdat && mp4->start == 0 && mp4->length == 0) { /* * send original file if moov atom resides before * mdat atom and client requests integral file */ return NGX_DECLINED; } conf = ngx_http_get_module_loc_conf(mp4->request, ngx_http_mp4_module); if (atom_data_size > mp4->buffer_size) { if (atom_data_size > conf->max_buffer_size) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "\"%s\" mp4 moov atom is too large:%uL, " "you may want to increase mp4_max_buffer_size", mp4->file.name.data, atom_data_size); return NGX_ERROR; } ngx_pfree(mp4->request->pool, mp4->buffer); mp4->buffer = NULL; mp4->buffer_pos = NULL; mp4->buffer_end = NULL; mp4->buffer_size = (size_t) atom_data_size + NGX_HTTP_MP4_MOOV_BUFFER_EXCESS * no_mdat; } if (ngx_http_mp4_read(mp4, (size_t) atom_data_size) != NGX_OK) { return NGX_ERROR; } mp4->trak.elts = &mp4->traks; mp4->trak.size = sizeof(ngx_http_mp4_trak_t); mp4->trak.nalloc = 2; mp4->trak.pool = mp4->request->pool; atom = &mp4->moov_atom_buf; atom->temporary = 1; atom->pos = mp4->moov_atom_header; atom->last = mp4->moov_atom_header + 8; mp4->moov_atom.buf = &mp4->moov_atom_buf; rc = ngx_http_mp4_read_atom(mp4, ngx_http_mp4_moov_atoms, atom_data_size); ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 moov atom done"); if (no_mdat) { mp4->buffer_start = mp4->buffer_pos; mp4->buffer_size = NGX_HTTP_MP4_MOOV_BUFFER_EXCESS; if (mp4->buffer_start + mp4->buffer_size > mp4->buffer_end) { mp4->buffer = NULL; mp4->buffer_pos = NULL; mp4->buffer_end = NULL; } } else { /* skip atoms after moov atom */ mp4->offset = mp4->end; } return rc; } static ngx_int_t ngx_http_mp4_read_mdat_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size) { ngx_buf_t *data; ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 mdat atom"); data = &mp4->mdat_data_buf; data->file = &mp4->file; data->in_file = 1; data->last_buf = 1; data->last_in_chain = 1; data->file_last = mp4->offset + atom_data_size; mp4->mdat_atom.buf = &mp4->mdat_atom_buf; mp4->mdat_atom.next = &mp4->mdat_data; mp4->mdat_data.buf = data; if (mp4->trak.nelts) { /* skip atoms after mdat atom */ mp4->offset = mp4->end; } else { ngx_mp4_atom_next(mp4, atom_data_size); } return NGX_OK; } static size_t ngx_http_mp4_update_mdat_atom(ngx_http_mp4_file_t *mp4, off_t start_offset, off_t end_offset) { off_t atom_data_size; u_char *atom_header; uint32_t atom_header_size; uint64_t atom_size; ngx_buf_t *atom; atom_data_size = end_offset - start_offset; mp4->mdat_data.buf->file_pos = start_offset; mp4->mdat_data.buf->file_last = end_offset; ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mdat new offset @%O:%O", start_offset, atom_data_size); atom_header = mp4->mdat_atom_header; if ((uint64_t) atom_data_size > (uint64_t) 0xffffffff) { atom_size = 1; atom_header_size = sizeof(ngx_mp4_atom_header64_t); ngx_mp4_set_64value(atom_header + sizeof(ngx_mp4_atom_header_t), sizeof(ngx_mp4_atom_header64_t) + atom_data_size); } else { atom_size = sizeof(ngx_mp4_atom_header_t) + atom_data_size; atom_header_size = sizeof(ngx_mp4_atom_header_t); } mp4->content_length += atom_header_size + atom_data_size; ngx_mp4_set_32value(atom_header, atom_size); ngx_mp4_set_atom_name(atom_header, 'm', 'd', 'a', 't'); atom = &mp4->mdat_atom_buf; atom->temporary = 1; atom->pos = atom_header; atom->last = atom_header + atom_header_size; return atom_header_size; } typedef struct { u_char size[4]; u_char name[4]; u_char version[1]; u_char flags[3]; u_char creation_time[4]; u_char modification_time[4]; u_char timescale[4]; u_char duration[4]; u_char rate[4]; u_char volume[2]; u_char reserved[10]; u_char matrix[36]; u_char preview_time[4]; u_char preview_duration[4]; u_char poster_time[4]; u_char selection_time[4]; u_char selection_duration[4]; u_char current_time[4]; u_char next_track_id[4]; } ngx_mp4_mvhd_atom_t; typedef struct { u_char size[4]; u_char name[4]; u_char version[1]; u_char flags[3]; u_char creation_time[8]; u_char modification_time[8]; u_char timescale[4]; u_char duration[8]; u_char rate[4]; u_char volume[2]; u_char reserved[10]; u_char matrix[36]; u_char preview_time[4]; u_char preview_duration[4]; u_char poster_time[4]; u_char selection_time[4]; u_char selection_duration[4]; u_char current_time[4]; u_char next_track_id[4]; } ngx_mp4_mvhd64_atom_t; static ngx_int_t ngx_http_mp4_read_mvhd_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size) { u_char *atom_header; size_t atom_size; uint32_t timescale; uint64_t duration, start_time, length_time; ngx_buf_t *atom; ngx_mp4_mvhd_atom_t *mvhd_atom; ngx_mp4_mvhd64_atom_t *mvhd64_atom; ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 mvhd atom"); atom_header = ngx_mp4_atom_header(mp4); mvhd_atom = (ngx_mp4_mvhd_atom_t *) atom_header; mvhd64_atom = (ngx_mp4_mvhd64_atom_t *) atom_header; ngx_mp4_set_atom_name(atom_header, 'm', 'v', 'h', 'd'); if (ngx_mp4_atom_data_size(ngx_mp4_mvhd_atom_t) > atom_data_size) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "\"%s\" mp4 mvhd atom too small", mp4->file.name.data); return NGX_ERROR; } if (mvhd_atom->version[0] == 0) { /* version 0: 32-bit duration */ timescale = ngx_mp4_get_32value(mvhd_atom->timescale); duration = ngx_mp4_get_32value(mvhd_atom->duration); } else { /* version 1: 64-bit duration */ if (ngx_mp4_atom_data_size(ngx_mp4_mvhd64_atom_t) > atom_data_size) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "\"%s\" mp4 mvhd atom too small", mp4->file.name.data); return NGX_ERROR; } timescale = ngx_mp4_get_32value(mvhd64_atom->timescale); duration = ngx_mp4_get_64value(mvhd64_atom->duration); } mp4->timescale = timescale; ngx_log_debug3(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mvhd timescale:%uD, duration:%uL, time:%.3fs", timescale, duration, (double) duration / timescale); start_time = (uint64_t) mp4->start * timescale / 1000; if (duration < start_time) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "\"%s\" mp4 start time exceeds file duration", mp4->file.name.data); return NGX_ERROR; } duration -= start_time; if (mp4->length) { length_time = (uint64_t) mp4->length * timescale / 1000; if (duration > length_time) { duration = length_time; } } ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mvhd new duration:%uL, time:%.3fs", duration, (double) duration / timescale); atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size; ngx_mp4_set_32value(mvhd_atom->size, atom_size); if (mvhd_atom->version[0] == 0) { ngx_mp4_set_32value(mvhd_atom->duration, duration); } else { ngx_mp4_set_64value(mvhd64_atom->duration, duration); } atom = &mp4->mvhd_atom_buf; atom->temporary = 1; atom->pos = atom_header; atom->last = atom_header + atom_size; mp4->mvhd_atom.buf = atom; ngx_mp4_atom_next(mp4, atom_data_size); return NGX_OK; } static ngx_int_t ngx_http_mp4_read_trak_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size) { u_char *atom_header, *atom_end; off_t atom_file_end; ngx_int_t rc; ngx_buf_t *atom; ngx_http_mp4_trak_t *trak; ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 trak atom"); trak = ngx_array_push(&mp4->trak); if (trak == NULL) { return NGX_ERROR; } ngx_memzero(trak, sizeof(ngx_http_mp4_trak_t)); atom_header = ngx_mp4_atom_header(mp4); ngx_mp4_set_atom_name(atom_header, 't', 'r', 'a', 'k'); atom = &trak->trak_atom_buf; atom->temporary = 1; atom->pos = atom_header; atom->last = atom_header + sizeof(ngx_mp4_atom_header_t); trak->out[NGX_HTTP_MP4_TRAK_ATOM].buf = atom; atom_end = mp4->buffer_pos + (size_t) atom_data_size; atom_file_end = mp4->offset + atom_data_size; rc = ngx_http_mp4_read_atom(mp4, ngx_http_mp4_trak_atoms, atom_data_size); ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 trak atom: %i", rc); if (rc == NGX_DECLINED) { /* skip this trak */ ngx_memzero(trak, sizeof(ngx_http_mp4_trak_t)); mp4->trak.nelts--; mp4->buffer_pos = atom_end; mp4->offset = atom_file_end; return NGX_OK; } return rc; } static void ngx_http_mp4_update_trak_atom(ngx_http_mp4_file_t *mp4, ngx_http_mp4_trak_t *trak) { ngx_buf_t *atom; trak->size += sizeof(ngx_mp4_atom_header_t); atom = &trak->trak_atom_buf; ngx_mp4_set_32value(atom->pos, trak->size); } static ngx_int_t ngx_http_mp4_read_cmov_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "\"%s\" mp4 compressed moov atom (cmov) is not supported", mp4->file.name.data); return NGX_ERROR; } typedef struct { u_char size[4]; u_char name[4]; u_char version[1]; u_char flags[3]; u_char creation_time[4]; u_char modification_time[4]; u_char track_id[4]; u_char reserved1[4]; u_char duration[4]; u_char reserved2[8]; u_char layer[2]; u_char group[2]; u_char volume[2]; u_char reserved3[2]; u_char matrix[36]; u_char width[4]; u_char height[4]; } ngx_mp4_tkhd_atom_t; typedef struct { u_char size[4]; u_char name[4]; u_char version[1]; u_char flags[3]; u_char creation_time[8]; u_char modification_time[8]; u_char track_id[4]; u_char reserved1[4]; u_char duration[8]; u_char reserved2[8]; u_char layer[2]; u_char group[2]; u_char volume[2]; u_char reserved3[2]; u_char matrix[36]; u_char width[4]; u_char height[4]; } ngx_mp4_tkhd64_atom_t; static ngx_int_t ngx_http_mp4_read_tkhd_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size) { u_char *atom_header; size_t atom_size; uint64_t duration, start_time, length_time; ngx_buf_t *atom; ngx_http_mp4_trak_t *trak; ngx_mp4_tkhd_atom_t *tkhd_atom; ngx_mp4_tkhd64_atom_t *tkhd64_atom; ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 tkhd atom"); atom_header = ngx_mp4_atom_header(mp4); tkhd_atom = (ngx_mp4_tkhd_atom_t *) atom_header; tkhd64_atom = (ngx_mp4_tkhd64_atom_t *) atom_header; ngx_mp4_set_atom_name(tkhd_atom, 't', 'k', 'h', 'd'); if (ngx_mp4_atom_data_size(ngx_mp4_tkhd_atom_t) > atom_data_size) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "\"%s\" mp4 tkhd atom too small", mp4->file.name.data); return NGX_ERROR; } if (tkhd_atom->version[0] == 0) { /* version 0: 32-bit duration */ duration = ngx_mp4_get_32value(tkhd_atom->duration); } else { /* version 1: 64-bit duration */ if (ngx_mp4_atom_data_size(ngx_mp4_tkhd64_atom_t) > atom_data_size) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "\"%s\" mp4 tkhd atom too small", mp4->file.name.data); return NGX_ERROR; } duration = ngx_mp4_get_64value(tkhd64_atom->duration); } ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "tkhd duration:%uL, time:%.3fs", duration, (double) duration / mp4->timescale); start_time = (uint64_t) mp4->start * mp4->timescale / 1000; if (duration <= start_time) { ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "tkhd duration is less than start time"); return NGX_DECLINED; } duration -= start_time; if (mp4->length) { length_time = (uint64_t) mp4->length * mp4->timescale / 1000; if (duration > length_time) { duration = length_time; } } ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "tkhd new duration:%uL, time:%.3fs", duration, (double) duration / mp4->timescale); atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size; trak = ngx_mp4_last_trak(mp4); trak->tkhd_size = atom_size; ngx_mp4_set_32value(tkhd_atom->size, atom_size); if (tkhd_atom->version[0] == 0) { ngx_mp4_set_32value(tkhd_atom->duration, duration); } else { ngx_mp4_set_64value(tkhd64_atom->duration, duration); } atom = &trak->tkhd_atom_buf; atom->temporary = 1; atom->pos = atom_header; atom->last = atom_header + atom_size; trak->out[NGX_HTTP_MP4_TKHD_ATOM].buf = atom; ngx_mp4_atom_next(mp4, atom_data_size); return NGX_OK; } static ngx_int_t ngx_http_mp4_read_mdia_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size) { u_char *atom_header; ngx_buf_t *atom; ngx_http_mp4_trak_t *trak; ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "process mdia atom"); atom_header = ngx_mp4_atom_header(mp4); ngx_mp4_set_atom_name(atom_header, 'm', 'd', 'i', 'a'); trak = ngx_mp4_last_trak(mp4); atom = &trak->mdia_atom_buf; atom->temporary = 1; atom->pos = atom_header; atom->last = atom_header + sizeof(ngx_mp4_atom_header_t); trak->out[NGX_HTTP_MP4_MDIA_ATOM].buf = atom; return ngx_http_mp4_read_atom(mp4, ngx_http_mp4_mdia_atoms, atom_data_size); } static void ngx_http_mp4_update_mdia_atom(ngx_http_mp4_file_t *mp4, ngx_http_mp4_trak_t *trak) { ngx_buf_t *atom; trak->size += sizeof(ngx_mp4_atom_header_t); atom = &trak->mdia_atom_buf; ngx_mp4_set_32value(atom->pos, trak->size); } typedef struct { u_char size[4]; u_char name[4]; u_char version[1]; u_char flags[3]; u_char creation_time[4]; u_char modification_time[4]; u_char timescale[4]; u_char duration[4]; u_char language[2]; u_char quality[2]; } ngx_mp4_mdhd_atom_t; typedef struct { u_char size[4]; u_char name[4]; u_char version[1]; u_char flags[3]; u_char creation_time[8]; u_char modification_time[8]; u_char timescale[4]; u_char duration[8]; u_char language[2]; u_char quality[2]; } ngx_mp4_mdhd64_atom_t; static ngx_int_t ngx_http_mp4_read_mdhd_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size) { u_char *atom_header; size_t atom_size; uint32_t timescale; uint64_t duration, start_time, length_time; ngx_buf_t *atom; ngx_http_mp4_trak_t *trak; ngx_mp4_mdhd_atom_t *mdhd_atom; ngx_mp4_mdhd64_atom_t *mdhd64_atom; ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 mdhd atom"); atom_header = ngx_mp4_atom_header(mp4); mdhd_atom = (ngx_mp4_mdhd_atom_t *) atom_header; mdhd64_atom = (ngx_mp4_mdhd64_atom_t *) atom_header; ngx_mp4_set_atom_name(mdhd_atom, 'm', 'd', 'h', 'd'); if (ngx_mp4_atom_data_size(ngx_mp4_mdhd_atom_t) > atom_data_size) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "\"%s\" mp4 mdhd atom too small", mp4->file.name.data); return NGX_ERROR; } if (mdhd_atom->version[0] == 0) { /* version 0: everything is 32-bit */ timescale = ngx_mp4_get_32value(mdhd_atom->timescale); duration = ngx_mp4_get_32value(mdhd_atom->duration); } else { /* version 1: 64-bit duration and 32-bit timescale */ if (ngx_mp4_atom_data_size(ngx_mp4_mdhd64_atom_t) > atom_data_size) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "\"%s\" mp4 mdhd atom too small", mp4->file.name.data); return NGX_ERROR; } timescale = ngx_mp4_get_32value(mdhd64_atom->timescale); duration = ngx_mp4_get_64value(mdhd64_atom->duration); } ngx_log_debug3(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mdhd timescale:%uD, duration:%uL, time:%.3fs", timescale, duration, (double) duration / timescale); start_time = (uint64_t) mp4->start * timescale / 1000; if (duration <= start_time) { ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mdhd duration is less than start time"); return NGX_DECLINED; } duration -= start_time; if (mp4->length) { length_time = (uint64_t) mp4->length * timescale / 1000; if (duration > length_time) { duration = length_time; } } ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mdhd new duration:%uL, time:%.3fs", duration, (double) duration / timescale); atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size; trak = ngx_mp4_last_trak(mp4); trak->mdhd_size = atom_size; trak->timescale = timescale; ngx_mp4_set_32value(mdhd_atom->size, atom_size); if (mdhd_atom->version[0] == 0) { ngx_mp4_set_32value(mdhd_atom->duration, duration); } else { ngx_mp4_set_64value(mdhd64_atom->duration, duration); } atom = &trak->mdhd_atom_buf; atom->temporary = 1; atom->pos = atom_header; atom->last = atom_header + atom_size; trak->out[NGX_HTTP_MP4_MDHD_ATOM].buf = atom; ngx_mp4_atom_next(mp4, atom_data_size); return NGX_OK; } static ngx_int_t ngx_http_mp4_read_hdlr_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size) { u_char *atom_header; size_t atom_size; ngx_buf_t *atom; ngx_http_mp4_trak_t *trak; ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 hdlr atom"); atom_header = ngx_mp4_atom_header(mp4); atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size; ngx_mp4_set_32value(atom_header, atom_size); ngx_mp4_set_atom_name(atom_header, 'h', 'd', 'l', 'r'); trak = ngx_mp4_last_trak(mp4); atom = &trak->hdlr_atom_buf; atom->temporary = 1; atom->pos = atom_header; atom->last = atom_header + atom_size; trak->hdlr_size = atom_size; trak->out[NGX_HTTP_MP4_HDLR_ATOM].buf = atom; ngx_mp4_atom_next(mp4, atom_data_size); return NGX_OK; } static ngx_int_t ngx_http_mp4_read_minf_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size) { u_char *atom_header; ngx_buf_t *atom; ngx_http_mp4_trak_t *trak; ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "process minf atom"); atom_header = ngx_mp4_atom_header(mp4); ngx_mp4_set_atom_name(atom_header, 'm', 'i', 'n', 'f'); trak = ngx_mp4_last_trak(mp4); atom = &trak->minf_atom_buf; atom->temporary = 1; atom->pos = atom_header; atom->last = atom_header + sizeof(ngx_mp4_atom_header_t); trak->out[NGX_HTTP_MP4_MINF_ATOM].buf = atom; return ngx_http_mp4_read_atom(mp4, ngx_http_mp4_minf_atoms, atom_data_size); } static void ngx_http_mp4_update_minf_atom(ngx_http_mp4_file_t *mp4, ngx_http_mp4_trak_t *trak) { ngx_buf_t *atom; trak->size += sizeof(ngx_mp4_atom_header_t) + trak->vmhd_size + trak->smhd_size + trak->dinf_size; atom = &trak->minf_atom_buf; ngx_mp4_set_32value(atom->pos, trak->size); } static ngx_int_t ngx_http_mp4_read_vmhd_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size) { u_char *atom_header; size_t atom_size; ngx_buf_t *atom; ngx_http_mp4_trak_t *trak; ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 vmhd atom"); atom_header = ngx_mp4_atom_header(mp4); atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size; ngx_mp4_set_32value(atom_header, atom_size); ngx_mp4_set_atom_name(atom_header, 'v', 'm', 'h', 'd'); trak = ngx_mp4_last_trak(mp4); atom = &trak->vmhd_atom_buf; atom->temporary = 1; atom->pos = atom_header; atom->last = atom_header + atom_size; trak->vmhd_size += atom_size; trak->out[NGX_HTTP_MP4_VMHD_ATOM].buf = atom; ngx_mp4_atom_next(mp4, atom_data_size); return NGX_OK; } static ngx_int_t ngx_http_mp4_read_smhd_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size) { u_char *atom_header; size_t atom_size; ngx_buf_t *atom; ngx_http_mp4_trak_t *trak; ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 smhd atom"); atom_header = ngx_mp4_atom_header(mp4); atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size; ngx_mp4_set_32value(atom_header, atom_size); ngx_mp4_set_atom_name(atom_header, 's', 'm', 'h', 'd'); trak = ngx_mp4_last_trak(mp4); atom = &trak->smhd_atom_buf; atom->temporary = 1; atom->pos = atom_header; atom->last = atom_header + atom_size; trak->smhd_size += atom_size; trak->out[NGX_HTTP_MP4_SMHD_ATOM].buf = atom; ngx_mp4_atom_next(mp4, atom_data_size); return NGX_OK; } static ngx_int_t ngx_http_mp4_read_dinf_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size) { u_char *atom_header; size_t atom_size; ngx_buf_t *atom; ngx_http_mp4_trak_t *trak; ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 dinf atom"); atom_header = ngx_mp4_atom_header(mp4); atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size; ngx_mp4_set_32value(atom_header, atom_size); ngx_mp4_set_atom_name(atom_header, 'd', 'i', 'n', 'f'); trak = ngx_mp4_last_trak(mp4); atom = &trak->dinf_atom_buf; atom->temporary = 1; atom->pos = atom_header; atom->last = atom_header + atom_size; trak->dinf_size += atom_size; trak->out[NGX_HTTP_MP4_DINF_ATOM].buf = atom; ngx_mp4_atom_next(mp4, atom_data_size); return NGX_OK; } static ngx_int_t ngx_http_mp4_read_stbl_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size) { u_char *atom_header; ngx_buf_t *atom; ngx_http_mp4_trak_t *trak; ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "process stbl atom"); atom_header = ngx_mp4_atom_header(mp4); ngx_mp4_set_atom_name(atom_header, 's', 't', 'b', 'l'); trak = ngx_mp4_last_trak(mp4); atom = &trak->stbl_atom_buf; atom->temporary = 1; atom->pos = atom_header; atom->last = atom_header + sizeof(ngx_mp4_atom_header_t); trak->out[NGX_HTTP_MP4_STBL_ATOM].buf = atom; return ngx_http_mp4_read_atom(mp4, ngx_http_mp4_stbl_atoms, atom_data_size); } static void ngx_http_mp4_update_stbl_atom(ngx_http_mp4_file_t *mp4, ngx_http_mp4_trak_t *trak) { ngx_buf_t *atom; trak->size += sizeof(ngx_mp4_atom_header_t); atom = &trak->stbl_atom_buf; ngx_mp4_set_32value(atom->pos, trak->size); } typedef struct { u_char size[4]; u_char name[4]; u_char version[1]; u_char flags[3]; u_char entries[4]; u_char media_size[4]; u_char media_name[4]; } ngx_mp4_stsd_atom_t; static ngx_int_t ngx_http_mp4_read_stsd_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size) { u_char *atom_header, *atom_table; size_t atom_size; ngx_buf_t *atom; ngx_mp4_stsd_atom_t *stsd_atom; ngx_http_mp4_trak_t *trak; /* sample description atom */ ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stsd atom"); atom_header = ngx_mp4_atom_header(mp4); stsd_atom = (ngx_mp4_stsd_atom_t *) atom_header; atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size; atom_table = atom_header + atom_size; ngx_mp4_set_32value(stsd_atom->size, atom_size); ngx_mp4_set_atom_name(stsd_atom, 's', 't', 's', 'd'); if (ngx_mp4_atom_data_size(ngx_mp4_stsd_atom_t) > atom_data_size) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "\"%s\" mp4 stsd atom too small", mp4->file.name.data); return NGX_ERROR; } ngx_log_debug3(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "stsd entries:%uD, media:%*s", ngx_mp4_get_32value(stsd_atom->entries), (size_t) 4, stsd_atom->media_name); trak = ngx_mp4_last_trak(mp4); atom = &trak->stsd_atom_buf; atom->temporary = 1; atom->pos = atom_header; atom->last = atom_table; trak->out[NGX_HTTP_MP4_STSD_ATOM].buf = atom; trak->size += atom_size; ngx_mp4_atom_next(mp4, atom_data_size); return NGX_OK; } typedef struct { u_char size[4]; u_char name[4]; u_char version[1]; u_char flags[3]; u_char entries[4]; } ngx_mp4_stts_atom_t; typedef struct { u_char count[4]; u_char duration[4]; } ngx_mp4_stts_entry_t; static ngx_int_t ngx_http_mp4_read_stts_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size) { u_char *atom_header, *atom_table, *atom_end; uint32_t entries; ngx_buf_t *atom, *data; ngx_mp4_stts_atom_t *stts_atom; ngx_http_mp4_trak_t *trak; /* time-to-sample atom */ ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stts atom"); atom_header = ngx_mp4_atom_header(mp4); stts_atom = (ngx_mp4_stts_atom_t *) atom_header; ngx_mp4_set_atom_name(stts_atom, 's', 't', 't', 's'); if (ngx_mp4_atom_data_size(ngx_mp4_stts_atom_t) > atom_data_size) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "\"%s\" mp4 stts atom too small", mp4->file.name.data); return NGX_ERROR; } entries = ngx_mp4_get_32value(stts_atom->entries); ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 time-to-sample entries:%uD", entries); if (ngx_mp4_atom_data_size(ngx_mp4_stts_atom_t) + entries * sizeof(ngx_mp4_stts_entry_t) > atom_data_size) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "\"%s\" mp4 stts atom too small", mp4->file.name.data); return NGX_ERROR; } atom_table = atom_header + sizeof(ngx_mp4_stts_atom_t); atom_end = atom_table + entries * sizeof(ngx_mp4_stts_entry_t); trak = ngx_mp4_last_trak(mp4); trak->time_to_sample_entries = entries; atom = &trak->stts_atom_buf; atom->temporary = 1; atom->pos = atom_header; atom->last = atom_table; data = &trak->stts_data_buf; data->temporary = 1; data->pos = atom_table; data->last = atom_end; trak->out[NGX_HTTP_MP4_STTS_ATOM].buf = atom; trak->out[NGX_HTTP_MP4_STTS_DATA].buf = data; ngx_mp4_atom_next(mp4, atom_data_size); return NGX_OK; } static ngx_int_t ngx_http_mp4_update_stts_atom(ngx_http_mp4_file_t *mp4, ngx_http_mp4_trak_t *trak) { size_t atom_size; ngx_buf_t *atom, *data; ngx_mp4_stts_atom_t *stts_atom; /* * mdia.minf.stbl.stts updating requires trak->timescale * from mdia.mdhd atom which may reside after mdia.minf */ ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stts atom update"); data = trak->out[NGX_HTTP_MP4_STTS_DATA].buf; if (data == NULL) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "no mp4 stts atoms were found in \"%s\"", mp4->file.name.data); return NGX_ERROR; } if (ngx_http_mp4_crop_stts_data(mp4, trak, 1) != NGX_OK) { return NGX_ERROR; } if (ngx_http_mp4_crop_stts_data(mp4, trak, 0) != NGX_OK) { return NGX_ERROR; } ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "time-to-sample entries:%uD", trak->time_to_sample_entries); atom_size = sizeof(ngx_mp4_stts_atom_t) + (data->last - data->pos); trak->size += atom_size; atom = trak->out[NGX_HTTP_MP4_STTS_ATOM].buf; stts_atom = (ngx_mp4_stts_atom_t *) atom->pos; ngx_mp4_set_32value(stts_atom->size, atom_size); ngx_mp4_set_32value(stts_atom->entries, trak->time_to_sample_entries); return NGX_OK; } static ngx_int_t ngx_http_mp4_crop_stts_data(ngx_http_mp4_file_t *mp4, ngx_http_mp4_trak_t *trak, ngx_uint_t start) { uint32_t count, duration, rest; uint64_t start_time; ngx_buf_t *data; ngx_uint_t start_sample, entries, start_sec; ngx_mp4_stts_entry_t *entry, *end; if (start) { start_sec = mp4->start; ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stts crop start_time:%ui", start_sec); } else if (mp4->length) { start_sec = mp4->length; ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stts crop end_time:%ui", start_sec); } else { return NGX_OK; } data = trak->out[NGX_HTTP_MP4_STTS_DATA].buf; start_time = (uint64_t) start_sec * trak->timescale / 1000; entries = trak->time_to_sample_entries; start_sample = 0; entry = (ngx_mp4_stts_entry_t *) data->pos; end = (ngx_mp4_stts_entry_t *) data->last; while (entry < end) { count = ngx_mp4_get_32value(entry->count); duration = ngx_mp4_get_32value(entry->duration); ngx_log_debug3(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "time:%uL, count:%uD, duration:%uD", start_time, count, duration); if (start_time < (uint64_t) count * duration) { start_sample += (ngx_uint_t) (start_time / duration); rest = (uint32_t) (start_time / duration); goto found; } start_sample += count; start_time -= count * duration; entries--; entry++; } if (start) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "start time is out mp4 stts samples in \"%s\"", mp4->file.name.data); return NGX_ERROR; } else { trak->end_sample = trak->start_sample + start_sample; ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "end_sample:%ui", trak->end_sample); return NGX_OK; } found: if (start) { ngx_mp4_set_32value(entry->count, count - rest); data->pos = (u_char *) entry; trak->time_to_sample_entries = entries; trak->start_sample = start_sample; ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "start_sample:%ui, new count:%uD", trak->start_sample, count - rest); } else { ngx_mp4_set_32value(entry->count, rest); data->last = (u_char *) (entry + 1); trak->time_to_sample_entries -= entries - 1; trak->end_sample = trak->start_sample + start_sample; ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "end_sample:%ui, new count:%uD", trak->end_sample, rest); } return NGX_OK; } typedef struct { u_char size[4]; u_char name[4]; u_char version[1]; u_char flags[3]; u_char entries[4]; } ngx_http_mp4_stss_atom_t; static ngx_int_t ngx_http_mp4_read_stss_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size) { u_char *atom_header, *atom_table, *atom_end; uint32_t entries; ngx_buf_t *atom, *data; ngx_http_mp4_trak_t *trak; ngx_http_mp4_stss_atom_t *stss_atom; /* sync samples atom */ ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stss atom"); atom_header = ngx_mp4_atom_header(mp4); stss_atom = (ngx_http_mp4_stss_atom_t *) atom_header; ngx_mp4_set_atom_name(stss_atom, 's', 't', 's', 's'); if (ngx_mp4_atom_data_size(ngx_http_mp4_stss_atom_t) > atom_data_size) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "\"%s\" mp4 stss atom too small", mp4->file.name.data); return NGX_ERROR; } entries = ngx_mp4_get_32value(stss_atom->entries); ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "sync sample entries:%uD", entries); trak = ngx_mp4_last_trak(mp4); trak->sync_samples_entries = entries; atom_table = atom_header + sizeof(ngx_http_mp4_stss_atom_t); atom = &trak->stss_atom_buf; atom->temporary = 1; atom->pos = atom_header; atom->last = atom_table; if (ngx_mp4_atom_data_size(ngx_http_mp4_stss_atom_t) + entries * sizeof(uint32_t) > atom_data_size) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "\"%s\" mp4 stss atom too small", mp4->file.name.data); return NGX_ERROR; } atom_end = atom_table + entries * sizeof(uint32_t); data = &trak->stss_data_buf; data->temporary = 1; data->pos = atom_table; data->last = atom_end; trak->out[NGX_HTTP_MP4_STSS_ATOM].buf = atom; trak->out[NGX_HTTP_MP4_STSS_DATA].buf = data; ngx_mp4_atom_next(mp4, atom_data_size); return NGX_OK; } static ngx_int_t ngx_http_mp4_update_stss_atom(ngx_http_mp4_file_t *mp4, ngx_http_mp4_trak_t *trak) { size_t atom_size; uint32_t sample, start_sample, *entry, *end; ngx_buf_t *atom, *data; ngx_http_mp4_stss_atom_t *stss_atom; /* * mdia.minf.stbl.stss updating requires trak->start_sample * from mdia.minf.stbl.stts which depends on value from mdia.mdhd * atom which may reside after mdia.minf */ ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stss atom update"); data = trak->out[NGX_HTTP_MP4_STSS_DATA].buf; if (data == NULL) { return NGX_OK; } ngx_http_mp4_crop_stss_data(mp4, trak, 1); ngx_http_mp4_crop_stss_data(mp4, trak, 0); ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "sync sample entries:%uD", trak->sync_samples_entries); if (trak->sync_samples_entries) { entry = (uint32_t *) data->pos; end = (uint32_t *) data->last; start_sample = trak->start_sample; while (entry < end) { sample = ngx_mp4_get_32value(entry); sample -= start_sample; ngx_mp4_set_32value(entry, sample); entry++; } } else { trak->out[NGX_HTTP_MP4_STSS_DATA].buf = NULL; } atom_size = sizeof(ngx_http_mp4_stss_atom_t) + (data->last - data->pos); trak->size += atom_size; atom = trak->out[NGX_HTTP_MP4_STSS_ATOM].buf; stss_atom = (ngx_http_mp4_stss_atom_t *) atom->pos; ngx_mp4_set_32value(stss_atom->size, atom_size); ngx_mp4_set_32value(stss_atom->entries, trak->sync_samples_entries); return NGX_OK; } static void ngx_http_mp4_crop_stss_data(ngx_http_mp4_file_t *mp4, ngx_http_mp4_trak_t *trak, ngx_uint_t start) { uint32_t sample, start_sample, *entry, *end; ngx_buf_t *data; ngx_uint_t entries; /* sync samples starts from 1 */ if (start) { start_sample = trak->start_sample + 1; ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stss crop start_sample:%uD", start_sample); } else if (mp4->length) { start_sample = trak->end_sample + 1; ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stss crop end_sample:%uD", start_sample); } else { return; } data = trak->out[NGX_HTTP_MP4_STSS_DATA].buf; entries = trak->sync_samples_entries; entry = (uint32_t *) data->pos; end = (uint32_t *) data->last; while (entry < end) { sample = ngx_mp4_get_32value(entry); ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "sync:%uD", sample); if (sample >= start_sample) { goto found; } entries--; entry++; } ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "sample is out of mp4 stss atom"); found: if (start) { data->pos = (u_char *) entry; trak->sync_samples_entries = entries; } else { data->last = (u_char *) entry; trak->sync_samples_entries -= entries; } } typedef struct { u_char size[4]; u_char name[4]; u_char version[1]; u_char flags[3]; u_char entries[4]; } ngx_mp4_ctts_atom_t; typedef struct { u_char count[4]; u_char offset[4]; } ngx_mp4_ctts_entry_t; static ngx_int_t ngx_http_mp4_read_ctts_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size) { u_char *atom_header, *atom_table, *atom_end; uint32_t entries; ngx_buf_t *atom, *data; ngx_mp4_ctts_atom_t *ctts_atom; ngx_http_mp4_trak_t *trak; /* composition offsets atom */ ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 ctts atom"); atom_header = ngx_mp4_atom_header(mp4); ctts_atom = (ngx_mp4_ctts_atom_t *) atom_header; ngx_mp4_set_atom_name(ctts_atom, 'c', 't', 't', 's'); if (ngx_mp4_atom_data_size(ngx_mp4_ctts_atom_t) > atom_data_size) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "\"%s\" mp4 ctts atom too small", mp4->file.name.data); return NGX_ERROR; } entries = ngx_mp4_get_32value(ctts_atom->entries); ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "composition offset entries:%uD", entries); trak = ngx_mp4_last_trak(mp4); trak->composition_offset_entries = entries; atom_table = atom_header + sizeof(ngx_mp4_ctts_atom_t); atom = &trak->ctts_atom_buf; atom->temporary = 1; atom->pos = atom_header; atom->last = atom_table; if (ngx_mp4_atom_data_size(ngx_mp4_ctts_atom_t) + entries * sizeof(ngx_mp4_ctts_entry_t) > atom_data_size) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "\"%s\" mp4 ctts atom too small", mp4->file.name.data); return NGX_ERROR; } atom_end = atom_table + entries * sizeof(ngx_mp4_ctts_entry_t); data = &trak->ctts_data_buf; data->temporary = 1; data->pos = atom_table; data->last = atom_end; trak->out[NGX_HTTP_MP4_CTTS_ATOM].buf = atom; trak->out[NGX_HTTP_MP4_CTTS_DATA].buf = data; ngx_mp4_atom_next(mp4, atom_data_size); return NGX_OK; } static void ngx_http_mp4_update_ctts_atom(ngx_http_mp4_file_t *mp4, ngx_http_mp4_trak_t *trak) { size_t atom_size; ngx_buf_t *atom, *data; ngx_mp4_ctts_atom_t *ctts_atom; /* * mdia.minf.stbl.ctts updating requires trak->start_sample * from mdia.minf.stbl.stts which depends on value from mdia.mdhd * atom which may reside after mdia.minf */ ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 ctts atom update"); data = trak->out[NGX_HTTP_MP4_CTTS_DATA].buf; if (data == NULL) { return; } ngx_http_mp4_crop_ctts_data(mp4, trak, 1); ngx_http_mp4_crop_ctts_data(mp4, trak, 0); ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "composition offset entries:%uD", trak->composition_offset_entries); if (trak->composition_offset_entries == 0) { trak->out[NGX_HTTP_MP4_CTTS_ATOM].buf = NULL; trak->out[NGX_HTTP_MP4_CTTS_DATA].buf = NULL; return; } atom_size = sizeof(ngx_mp4_ctts_atom_t) + (data->last - data->pos); trak->size += atom_size; atom = trak->out[NGX_HTTP_MP4_CTTS_ATOM].buf; ctts_atom = (ngx_mp4_ctts_atom_t *) atom->pos; ngx_mp4_set_32value(ctts_atom->size, atom_size); ngx_mp4_set_32value(ctts_atom->entries, trak->composition_offset_entries); return; } static void ngx_http_mp4_crop_ctts_data(ngx_http_mp4_file_t *mp4, ngx_http_mp4_trak_t *trak, ngx_uint_t start) { uint32_t count, start_sample, rest; ngx_buf_t *data; ngx_uint_t entries; ngx_mp4_ctts_entry_t *entry, *end; /* sync samples starts from 1 */ if (start) { start_sample = trak->start_sample + 1; ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 ctts crop start_sample:%uD", start_sample); } else if (mp4->length) { start_sample = trak->end_sample - trak->start_sample + 1; ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 ctts crop end_sample:%uD", start_sample); } else { return; } data = trak->out[NGX_HTTP_MP4_CTTS_DATA].buf; entries = trak->composition_offset_entries; entry = (ngx_mp4_ctts_entry_t *) data->pos; end = (ngx_mp4_ctts_entry_t *) data->last; while (entry < end) { count = ngx_mp4_get_32value(entry->count); ngx_log_debug3(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "sample:%uD, count:%uD, offset:%uD", start_sample, count, ngx_mp4_get_32value(entry->offset)); if (start_sample <= count) { rest = start_sample - 1; goto found; } start_sample -= count; entries--; entry++; } if (start) { data->pos = (u_char *) end; trak->composition_offset_entries = 0; } return; found: if (start) { ngx_mp4_set_32value(entry->count, count - rest); data->pos = (u_char *) entry; trak->composition_offset_entries = entries; } else { ngx_mp4_set_32value(entry->count, rest); data->last = (u_char *) (entry + 1); trak->composition_offset_entries -= entries - 1; } } typedef struct { u_char size[4]; u_char name[4]; u_char version[1]; u_char flags[3]; u_char entries[4]; } ngx_mp4_stsc_atom_t; static ngx_int_t ngx_http_mp4_read_stsc_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size) { u_char *atom_header, *atom_table, *atom_end; uint32_t entries; ngx_buf_t *atom, *data; ngx_mp4_stsc_atom_t *stsc_atom; ngx_http_mp4_trak_t *trak; /* sample-to-chunk atom */ ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stsc atom"); atom_header = ngx_mp4_atom_header(mp4); stsc_atom = (ngx_mp4_stsc_atom_t *) atom_header; ngx_mp4_set_atom_name(stsc_atom, 's', 't', 's', 'c'); if (ngx_mp4_atom_data_size(ngx_mp4_stsc_atom_t) > atom_data_size) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "\"%s\" mp4 stsc atom too small", mp4->file.name.data); return NGX_ERROR; } entries = ngx_mp4_get_32value(stsc_atom->entries); ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "sample-to-chunk entries:%uD", entries); if (ngx_mp4_atom_data_size(ngx_mp4_stsc_atom_t) + entries * sizeof(ngx_mp4_stsc_entry_t) > atom_data_size) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "\"%s\" mp4 stsc atom too small", mp4->file.name.data); return NGX_ERROR; } atom_table = atom_header + sizeof(ngx_mp4_stsc_atom_t); atom_end = atom_table + entries * sizeof(ngx_mp4_stsc_entry_t); trak = ngx_mp4_last_trak(mp4); trak->sample_to_chunk_entries = entries; atom = &trak->stsc_atom_buf; atom->temporary = 1; atom->pos = atom_header; atom->last = atom_table; data = &trak->stsc_data_buf; data->temporary = 1; data->pos = atom_table; data->last = atom_end; trak->out[NGX_HTTP_MP4_STSC_ATOM].buf = atom; trak->out[NGX_HTTP_MP4_STSC_DATA].buf = data; ngx_mp4_atom_next(mp4, atom_data_size); return NGX_OK; } static ngx_int_t ngx_http_mp4_update_stsc_atom(ngx_http_mp4_file_t *mp4, ngx_http_mp4_trak_t *trak) { size_t atom_size; uint32_t chunk; ngx_buf_t *atom, *data; ngx_mp4_stsc_atom_t *stsc_atom; ngx_mp4_stsc_entry_t *entry, *end; /* * mdia.minf.stbl.stsc updating requires trak->start_sample * from mdia.minf.stbl.stts which depends on value from mdia.mdhd * atom which may reside after mdia.minf */ ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stsc atom update"); data = trak->out[NGX_HTTP_MP4_STSC_DATA].buf; if (data == NULL) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "no mp4 stsc atoms were found in \"%s\"", mp4->file.name.data); return NGX_ERROR; } if (trak->sample_to_chunk_entries == 0) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "zero number of entries in stsc atom in \"%s\"", mp4->file.name.data); return NGX_ERROR; } if (ngx_http_mp4_crop_stsc_data(mp4, trak, 1) != NGX_OK) { return NGX_ERROR; } if (ngx_http_mp4_crop_stsc_data(mp4, trak, 0) != NGX_OK) { return NGX_ERROR; } ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "sample-to-chunk entries:%uD", trak->sample_to_chunk_entries); entry = (ngx_mp4_stsc_entry_t *) data->pos; end = (ngx_mp4_stsc_entry_t *) data->last; while (entry < end) { chunk = ngx_mp4_get_32value(entry->chunk); chunk -= trak->start_chunk; ngx_mp4_set_32value(entry->chunk, chunk); entry++; } atom_size = sizeof(ngx_mp4_stsc_atom_t) + trak->sample_to_chunk_entries * sizeof(ngx_mp4_stsc_entry_t); trak->size += atom_size; atom = trak->out[NGX_HTTP_MP4_STSC_ATOM].buf; stsc_atom = (ngx_mp4_stsc_atom_t *) atom->pos; ngx_mp4_set_32value(stsc_atom->size, atom_size); ngx_mp4_set_32value(stsc_atom->entries, trak->sample_to_chunk_entries); return NGX_OK; } static ngx_int_t ngx_http_mp4_crop_stsc_data(ngx_http_mp4_file_t *mp4, ngx_http_mp4_trak_t *trak, ngx_uint_t start) { uint32_t start_sample, chunk, samples, id, next_chunk, n, prev_samples; ngx_buf_t *data, *buf; ngx_uint_t entries, target_chunk, chunk_samples; ngx_mp4_stsc_entry_t *entry, *end, *first; entries = trak->sample_to_chunk_entries - 1; if (start) { start_sample = (uint32_t) trak->start_sample; ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stsc crop start_sample:%uD", start_sample); } else if (mp4->length) { start_sample = (uint32_t) (trak->end_sample - trak->start_sample); samples = 0; data = trak->out[NGX_HTTP_MP4_STSC_START].buf; if (data) { entry = (ngx_mp4_stsc_entry_t *) data->pos; samples = ngx_mp4_get_32value(entry->samples); entries--; if (samples > start_sample) { samples = start_sample; ngx_mp4_set_32value(entry->samples, samples); } start_sample -= samples; } ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stsc crop end_sample:%uD, ext_samples:%uD", start_sample, samples); } else { return NGX_OK; } data = trak->out[NGX_HTTP_MP4_STSC_DATA].buf; entry = (ngx_mp4_stsc_entry_t *) data->pos; end = (ngx_mp4_stsc_entry_t *) data->last; chunk = ngx_mp4_get_32value(entry->chunk); samples = ngx_mp4_get_32value(entry->samples); id = ngx_mp4_get_32value(entry->id); prev_samples = 0; entry++; while (entry < end) { next_chunk = ngx_mp4_get_32value(entry->chunk); ngx_log_debug5(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "sample:%uD, chunk:%uD, chunks:%uD, " "samples:%uD, id:%uD", start_sample, chunk, next_chunk - chunk, samples, id); n = (next_chunk - chunk) * samples; if (start_sample < n) { goto found; } start_sample -= n; prev_samples = samples; chunk = next_chunk; samples = ngx_mp4_get_32value(entry->samples); id = ngx_mp4_get_32value(entry->id); entries--; entry++; } next_chunk = trak->chunks + 1; ngx_log_debug4(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "sample:%uD, chunk:%uD, chunks:%uD, samples:%uD", start_sample, chunk, next_chunk - chunk, samples); n = (next_chunk - chunk) * samples; if (start_sample > n) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "%s time is out mp4 stsc chunks in \"%s\"", start ? "start" : "end", mp4->file.name.data); return NGX_ERROR; } found: entries++; entry--; if (samples == 0) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "zero number of samples in \"%s\"", mp4->file.name.data); return NGX_ERROR; } target_chunk = chunk - 1; target_chunk += start_sample / samples; chunk_samples = start_sample % samples; if (start) { data->pos = (u_char *) entry; trak->sample_to_chunk_entries = entries; trak->start_chunk = target_chunk; trak->start_chunk_samples = chunk_samples; ngx_mp4_set_32value(entry->chunk, trak->start_chunk + 1); samples -= chunk_samples; ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "start_chunk:%ui, start_chunk_samples:%ui", trak->start_chunk, trak->start_chunk_samples); } else { if (start_sample) { data->last = (u_char *) (entry + 1); trak->sample_to_chunk_entries -= entries - 1; trak->end_chunk_samples = samples; } else { data->last = (u_char *) entry; trak->sample_to_chunk_entries -= entries; trak->end_chunk_samples = prev_samples; } if (chunk_samples) { trak->end_chunk = target_chunk + 1; trak->end_chunk_samples = chunk_samples; } else { trak->end_chunk = target_chunk; } samples = chunk_samples; next_chunk = chunk + 1; ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "end_chunk:%ui, end_chunk_samples:%ui", trak->end_chunk, trak->end_chunk_samples); } if (chunk_samples && next_chunk - target_chunk == 2) { ngx_mp4_set_32value(entry->samples, samples); } else if (chunk_samples && start) { first = &trak->stsc_start_chunk_entry; ngx_mp4_set_32value(first->chunk, 1); ngx_mp4_set_32value(first->samples, samples); ngx_mp4_set_32value(first->id, id); buf = &trak->stsc_start_chunk_buf; buf->temporary = 1; buf->pos = (u_char *) first; buf->last = (u_char *) first + sizeof(ngx_mp4_stsc_entry_t); trak->out[NGX_HTTP_MP4_STSC_START].buf = buf; ngx_mp4_set_32value(entry->chunk, trak->start_chunk + 2); trak->sample_to_chunk_entries++; } else if (chunk_samples) { first = &trak->stsc_end_chunk_entry; ngx_mp4_set_32value(first->chunk, trak->end_chunk - trak->start_chunk); ngx_mp4_set_32value(first->samples, samples); ngx_mp4_set_32value(first->id, id); buf = &trak->stsc_end_chunk_buf; buf->temporary = 1; buf->pos = (u_char *) first; buf->last = (u_char *) first + sizeof(ngx_mp4_stsc_entry_t); trak->out[NGX_HTTP_MP4_STSC_END].buf = buf; trak->sample_to_chunk_entries++; } return NGX_OK; } typedef struct { u_char size[4]; u_char name[4]; u_char version[1]; u_char flags[3]; u_char uniform_size[4]; u_char entries[4]; } ngx_mp4_stsz_atom_t; static ngx_int_t ngx_http_mp4_read_stsz_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size) { u_char *atom_header, *atom_table, *atom_end; size_t atom_size; uint32_t entries, size; ngx_buf_t *atom, *data; ngx_mp4_stsz_atom_t *stsz_atom; ngx_http_mp4_trak_t *trak; /* sample sizes atom */ ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stsz atom"); atom_header = ngx_mp4_atom_header(mp4); stsz_atom = (ngx_mp4_stsz_atom_t *) atom_header; ngx_mp4_set_atom_name(stsz_atom, 's', 't', 's', 'z'); if (ngx_mp4_atom_data_size(ngx_mp4_stsz_atom_t) > atom_data_size) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "\"%s\" mp4 stsz atom too small", mp4->file.name.data); return NGX_ERROR; } size = ngx_mp4_get_32value(stsz_atom->uniform_size); entries = ngx_mp4_get_32value(stsz_atom->entries); ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "sample uniform size:%uD, entries:%uD", size, entries); trak = ngx_mp4_last_trak(mp4); trak->sample_sizes_entries = entries; atom_table = atom_header + sizeof(ngx_mp4_stsz_atom_t); atom = &trak->stsz_atom_buf; atom->temporary = 1; atom->pos = atom_header; atom->last = atom_table; trak->out[NGX_HTTP_MP4_STSZ_ATOM].buf = atom; if (size == 0) { if (ngx_mp4_atom_data_size(ngx_mp4_stsz_atom_t) + entries * sizeof(uint32_t) > atom_data_size) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "\"%s\" mp4 stsz atom too small", mp4->file.name.data); return NGX_ERROR; } atom_end = atom_table + entries * sizeof(uint32_t); data = &trak->stsz_data_buf; data->temporary = 1; data->pos = atom_table; data->last = atom_end; trak->out[NGX_HTTP_MP4_STSZ_DATA].buf = data; } else { /* if size != 0 then all samples are the same size */ /* TODO : chunk samples */ atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size; ngx_mp4_set_32value(atom_header, atom_size); trak->size += atom_size; } ngx_mp4_atom_next(mp4, atom_data_size); return NGX_OK; } static ngx_int_t ngx_http_mp4_update_stsz_atom(ngx_http_mp4_file_t *mp4, ngx_http_mp4_trak_t *trak) { size_t atom_size; uint32_t *pos, *end, entries; ngx_buf_t *atom, *data; ngx_mp4_stsz_atom_t *stsz_atom; /* * mdia.minf.stbl.stsz updating requires trak->start_sample * from mdia.minf.stbl.stts which depends on value from mdia.mdhd * atom which may reside after mdia.minf */ ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stsz atom update"); data = trak->out[NGX_HTTP_MP4_STSZ_DATA].buf; if (data) { entries = trak->sample_sizes_entries; if (trak->start_sample > entries) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "start time is out mp4 stsz samples in \"%s\"", mp4->file.name.data); return NGX_ERROR; } entries -= trak->start_sample; data->pos += trak->start_sample * sizeof(uint32_t); end = (uint32_t *) data->pos; for (pos = end - trak->start_chunk_samples; pos < end; pos++) { trak->start_chunk_samples_size += ngx_mp4_get_32value(pos); } ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "chunk samples sizes:%uL", trak->start_chunk_samples_size); if (mp4->length) { if (trak->end_sample - trak->start_sample > entries) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "end time is out mp4 stsz samples in \"%s\"", mp4->file.name.data); return NGX_ERROR; } entries = trak->end_sample - trak->start_sample; data->last = data->pos + entries * sizeof(uint32_t); end = (uint32_t *) data->last; for (pos = end - trak->end_chunk_samples; pos < end; pos++) { trak->end_chunk_samples_size += ngx_mp4_get_32value(pos); } ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stsz end_chunk_samples_size:%uL", trak->end_chunk_samples_size); } atom_size = sizeof(ngx_mp4_stsz_atom_t) + (data->last - data->pos); trak->size += atom_size; atom = trak->out[NGX_HTTP_MP4_STSZ_ATOM].buf; stsz_atom = (ngx_mp4_stsz_atom_t *) atom->pos; ngx_mp4_set_32value(stsz_atom->size, atom_size); ngx_mp4_set_32value(stsz_atom->entries, entries); } return NGX_OK; } typedef struct { u_char size[4]; u_char name[4]; u_char version[1]; u_char flags[3]; u_char entries[4]; } ngx_mp4_stco_atom_t; static ngx_int_t ngx_http_mp4_read_stco_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size) { u_char *atom_header, *atom_table, *atom_end; uint32_t entries; ngx_buf_t *atom, *data; ngx_mp4_stco_atom_t *stco_atom; ngx_http_mp4_trak_t *trak; /* chunk offsets atom */ ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stco atom"); atom_header = ngx_mp4_atom_header(mp4); stco_atom = (ngx_mp4_stco_atom_t *) atom_header; ngx_mp4_set_atom_name(stco_atom, 's', 't', 'c', 'o'); if (ngx_mp4_atom_data_size(ngx_mp4_stco_atom_t) > atom_data_size) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "\"%s\" mp4 stco atom too small", mp4->file.name.data); return NGX_ERROR; } entries = ngx_mp4_get_32value(stco_atom->entries); ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "chunks:%uD", entries); if (ngx_mp4_atom_data_size(ngx_mp4_stco_atom_t) + entries * sizeof(uint32_t) > atom_data_size) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "\"%s\" mp4 stco atom too small", mp4->file.name.data); return NGX_ERROR; } atom_table = atom_header + sizeof(ngx_mp4_stco_atom_t); atom_end = atom_table + entries * sizeof(uint32_t); trak = ngx_mp4_last_trak(mp4); trak->chunks = entries; atom = &trak->stco_atom_buf; atom->temporary = 1; atom->pos = atom_header; atom->last = atom_table; data = &trak->stco_data_buf; data->temporary = 1; data->pos = atom_table; data->last = atom_end; trak->out[NGX_HTTP_MP4_STCO_ATOM].buf = atom; trak->out[NGX_HTTP_MP4_STCO_DATA].buf = data; ngx_mp4_atom_next(mp4, atom_data_size); return NGX_OK; } static ngx_int_t ngx_http_mp4_update_stco_atom(ngx_http_mp4_file_t *mp4, ngx_http_mp4_trak_t *trak) { size_t atom_size; uint32_t entries; ngx_buf_t *atom, *data; ngx_mp4_stco_atom_t *stco_atom; /* * mdia.minf.stbl.stco updating requires trak->start_chunk * from mdia.minf.stbl.stsc which depends on value from mdia.mdhd * atom which may reside after mdia.minf */ ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stco atom update"); data = trak->out[NGX_HTTP_MP4_STCO_DATA].buf; if (data == NULL) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "no mp4 stco atoms were found in \"%s\"", mp4->file.name.data); return NGX_ERROR; } if (trak->start_chunk > trak->chunks) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "start time is out mp4 stco chunks in \"%s\"", mp4->file.name.data); return NGX_ERROR; } data->pos += trak->start_chunk * sizeof(uint32_t); trak->start_offset = ngx_mp4_get_32value(data->pos); trak->start_offset += trak->start_chunk_samples_size; ngx_mp4_set_32value(data->pos, trak->start_offset); ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "start chunk offset:%O", trak->start_offset); if (mp4->length) { if (trak->end_chunk > trak->chunks) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "end time is out mp4 stco chunks in \"%s\"", mp4->file.name.data); return NGX_ERROR; } entries = trak->end_chunk - trak->start_chunk; data->last = data->pos + entries * sizeof(uint32_t); if (entries) { trak->end_offset = ngx_mp4_get_32value(data->last - sizeof(uint32_t)); trak->end_offset += trak->end_chunk_samples_size; ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "end chunk offset:%O", trak->end_offset); } } else { entries = trak->chunks - trak->start_chunk; trak->end_offset = mp4->mdat_data.buf->file_last; } if (entries == 0) { trak->start_offset = mp4->end; trak->end_offset = 0; } atom_size = sizeof(ngx_mp4_stco_atom_t) + (data->last - data->pos); trak->size += atom_size; atom = trak->out[NGX_HTTP_MP4_STCO_ATOM].buf; stco_atom = (ngx_mp4_stco_atom_t *) atom->pos; ngx_mp4_set_32value(stco_atom->size, atom_size); ngx_mp4_set_32value(stco_atom->entries, entries); return NGX_OK; } static void ngx_http_mp4_adjust_stco_atom(ngx_http_mp4_file_t *mp4, ngx_http_mp4_trak_t *trak, int32_t adjustment) { uint32_t offset, *entry, *end; ngx_buf_t *data; /* * moov.trak.mdia.minf.stbl.stco adjustment requires * minimal start offset of all traks and new moov atom size */ ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stco atom adjustment"); data = trak->out[NGX_HTTP_MP4_STCO_DATA].buf; entry = (uint32_t *) data->pos; end = (uint32_t *) data->last; while (entry < end) { offset = ngx_mp4_get_32value(entry); offset += adjustment; ngx_mp4_set_32value(entry, offset); entry++; } } typedef struct { u_char size[4]; u_char name[4]; u_char version[1]; u_char flags[3]; u_char entries[4]; } ngx_mp4_co64_atom_t; static ngx_int_t ngx_http_mp4_read_co64_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size) { u_char *atom_header, *atom_table, *atom_end; uint32_t entries; ngx_buf_t *atom, *data; ngx_mp4_co64_atom_t *co64_atom; ngx_http_mp4_trak_t *trak; /* chunk offsets atom */ ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 co64 atom"); atom_header = ngx_mp4_atom_header(mp4); co64_atom = (ngx_mp4_co64_atom_t *) atom_header; ngx_mp4_set_atom_name(co64_atom, 'c', 'o', '6', '4'); if (ngx_mp4_atom_data_size(ngx_mp4_co64_atom_t) > atom_data_size) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "\"%s\" mp4 co64 atom too small", mp4->file.name.data); return NGX_ERROR; } entries = ngx_mp4_get_32value(co64_atom->entries); ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "chunks:%uD", entries); if (ngx_mp4_atom_data_size(ngx_mp4_co64_atom_t) + entries * sizeof(uint64_t) > atom_data_size) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "\"%s\" mp4 co64 atom too small", mp4->file.name.data); return NGX_ERROR; } atom_table = atom_header + sizeof(ngx_mp4_co64_atom_t); atom_end = atom_table + entries * sizeof(uint64_t); trak = ngx_mp4_last_trak(mp4); trak->chunks = entries; atom = &trak->co64_atom_buf; atom->temporary = 1; atom->pos = atom_header; atom->last = atom_table; data = &trak->co64_data_buf; data->temporary = 1; data->pos = atom_table; data->last = atom_end; trak->out[NGX_HTTP_MP4_CO64_ATOM].buf = atom; trak->out[NGX_HTTP_MP4_CO64_DATA].buf = data; ngx_mp4_atom_next(mp4, atom_data_size); return NGX_OK; } static ngx_int_t ngx_http_mp4_update_co64_atom(ngx_http_mp4_file_t *mp4, ngx_http_mp4_trak_t *trak) { size_t atom_size; uint64_t entries; ngx_buf_t *atom, *data; ngx_mp4_co64_atom_t *co64_atom; /* * mdia.minf.stbl.co64 updating requires trak->start_chunk * from mdia.minf.stbl.stsc which depends on value from mdia.mdhd * atom which may reside after mdia.minf */ ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 co64 atom update"); data = trak->out[NGX_HTTP_MP4_CO64_DATA].buf; if (data == NULL) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "no mp4 co64 atoms were found in \"%s\"", mp4->file.name.data); return NGX_ERROR; } if (trak->start_chunk > trak->chunks) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "start time is out mp4 co64 chunks in \"%s\"", mp4->file.name.data); return NGX_ERROR; } data->pos += trak->start_chunk * sizeof(uint64_t); trak->start_offset = ngx_mp4_get_64value(data->pos); trak->start_offset += trak->start_chunk_samples_size; ngx_mp4_set_64value(data->pos, trak->start_offset); ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "start chunk offset:%O", trak->start_offset); if (mp4->length) { if (trak->end_chunk > trak->chunks) { ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0, "end time is out mp4 co64 chunks in \"%s\"", mp4->file.name.data); return NGX_ERROR; } entries = trak->end_chunk - trak->start_chunk; data->last = data->pos + entries * sizeof(uint64_t); if (entries) { trak->end_offset = ngx_mp4_get_64value(data->last - sizeof(uint64_t)); trak->end_offset += trak->end_chunk_samples_size; ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "end chunk offset:%O", trak->end_offset); } } else { entries = trak->chunks - trak->start_chunk; trak->end_offset = mp4->mdat_data.buf->file_last; } if (entries == 0) { trak->start_offset = mp4->end; trak->end_offset = 0; } atom_size = sizeof(ngx_mp4_co64_atom_t) + (data->last - data->pos); trak->size += atom_size; atom = trak->out[NGX_HTTP_MP4_CO64_ATOM].buf; co64_atom = (ngx_mp4_co64_atom_t *) atom->pos; ngx_mp4_set_32value(co64_atom->size, atom_size); ngx_mp4_set_32value(co64_atom->entries, entries); return NGX_OK; } static void ngx_http_mp4_adjust_co64_atom(ngx_http_mp4_file_t *mp4, ngx_http_mp4_trak_t *trak, off_t adjustment) { uint64_t offset, *entry, *end; ngx_buf_t *data; /* * moov.trak.mdia.minf.stbl.co64 adjustment requires * minimal start offset of all traks and new moov atom size */ ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 co64 atom adjustment"); data = trak->out[NGX_HTTP_MP4_CO64_DATA].buf; entry = (uint64_t *) data->pos; end = (uint64_t *) data->last; while (entry < end) { offset = ngx_mp4_get_64value(entry); offset += adjustment; ngx_mp4_set_64value(entry, offset); entry++; } } static char * ngx_http_mp4(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_http_core_loc_conf_t *clcf; clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module); clcf->handler = ngx_http_mp4_handler; return NGX_CONF_OK; } static void * ngx_http_mp4_create_conf(ngx_conf_t *cf) { ngx_http_mp4_conf_t *conf; conf = ngx_palloc(cf->pool, sizeof(ngx_http_mp4_conf_t)); if (conf == NULL) { return NULL; } conf->buffer_size = NGX_CONF_UNSET_SIZE; conf->max_buffer_size = NGX_CONF_UNSET_SIZE; return conf; } static char * ngx_http_mp4_merge_conf(ngx_conf_t *cf, void *parent, void *child) { ngx_http_mp4_conf_t *prev = parent; ngx_http_mp4_conf_t *conf = child; ngx_conf_merge_size_value(conf->buffer_size, prev->buffer_size, 512 * 1024); ngx_conf_merge_size_value(conf->max_buffer_size, prev->max_buffer_size, 10 * 1024 * 1024); return NGX_CONF_OK; }