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-rw-r--r--usr.sbin/nginx/src/http/modules/ngx_http_mp4_module.c2854
1 files changed, 2854 insertions, 0 deletions
diff --git a/usr.sbin/nginx/src/http/modules/ngx_http_mp4_module.c b/usr.sbin/nginx/src/http/modules/ngx_http_mp4_module.c
new file mode 100644
index 00000000000..1140d91743a
--- /dev/null
+++ b/usr.sbin/nginx/src/http/modules/ngx_http_mp4_module.c
@@ -0,0 +1,2854 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ */
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+#include <ngx_http.h>
+
+
+#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_CHUNK 18
+#define NGX_HTTP_MP4_STSC_DATA 19
+#define NGX_HTTP_MP4_STSZ_ATOM 20
+#define NGX_HTTP_MP4_STSZ_DATA 21
+#define NGX_HTTP_MP4_STCO_ATOM 22
+#define NGX_HTTP_MP4_STCO_DATA 23
+#define NGX_HTTP_MP4_CO64_ATOM 24
+#define NGX_HTTP_MP4_CO64_DATA 25
+
+#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 start_chunk;
+ ngx_uint_t chunk_samples;
+ uint64_t chunk_samples_size;
+ off_t start_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_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_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;
+ 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_next(mp4, n) mp4->buffer_pos += 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) \
+ ( (((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_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);
+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);
+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_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 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 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_read_stsz_atom(ngx_http_mp4_file_t *mp4,
+ uint64_t atom_data_size);
+static void 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;
+ ngx_uint_t level;
+ 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_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:
+
+ 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;
+ 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 >= 0) {
+ r->allow_ranges = 0;
+
+ 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->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_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 = 1;
+ 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, 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_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
+ "mp4 start:%ui", mp4->start);
+
+ 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;
+ 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;
+ }
+
+ ngx_http_mp4_update_stsz_atom(mp4, &trak[i]);
+
+ 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;
+ }
+
+ *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;
+ }
+ }
+ }
+
+ 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;
+
+ adjustment = mp4->ftyp_size + mp4->moov_size
+ + ngx_http_mp4_update_mdat_atom(mp4, start_offset)
+ - start_offset;
+
+ ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
+ "mp4 adjustment:%D", 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 (mp4->buffer_pos + sizeof(uint32_t) > mp4->buffer_end) {
+ if (ngx_http_mp4_read(mp4) != 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 (mp4->buffer_pos + sizeof(ngx_mp4_atom_header64_t)
+ > mp4->buffer_end)
+ {
+ if (ngx_http_mp4_read(mp4) != NGX_OK) {
+ return NGX_ERROR;
+ }
+
+ atom_header = mp4->buffer_pos;
+ }
+
+ /* 64-bit atom size */
+ 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 (mp4->buffer_pos + sizeof(ngx_mp4_atom_header_t) > mp4->buffer_end) {
+ if (ngx_http_mp4_read(mp4) != 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",
+ 4, atom_name, mp4->offset, atom_size);
+
+ 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)
+{
+ ngx_int_t n;
+
+ if (mp4->offset + (off_t) mp4->buffer_size > mp4->end) {
+ mp4->buffer_size = (size_t) (mp4->end - mp4->offset);
+ }
+
+ 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;
+ mp4->buffer_end = mp4->buffer + mp4->buffer_size;
+ }
+
+ n = ngx_read_file(&mp4->file, mp4->buffer_start, mp4->buffer_size,
+ mp4->offset);
+
+ if (n == NGX_ERROR) {
+ return NGX_ERROR;
+ }
+
+ if (n == 0) {
+ return NGX_OK;
+ }
+
+ mp4->buffer_pos = mp4->buffer_start;
+
+ 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_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) {
+ /*
+ * 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;
+ }
+
+ 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;
+
+ } 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 atom_data_size;
+ u_char *atom_header;
+ uint32_t atom_header_size;
+ uint64_t atom_size;
+ ngx_buf_t *atom;
+
+ atom_data_size = mp4->mdat_data.buf->file_last - start_offset;
+ mp4->mdat_data.buf->file_pos = start_offset;
+ mp4->content_length += atom_data_size;
+
+ 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 > 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);
+ }
+
+ 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;
+ 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 (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 */
+ 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);
+
+ duration -= (uint64_t) mp4->start * timescale / 1000;
+
+ 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 + 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 reverved3[2];
+ u_char matrix[36];
+ u_char width[4];
+ u_char heigth[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 reverved3[2];
+ u_char matrix[36];
+ u_char width[4];
+ u_char heigth[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;
+ 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 (tkhd_atom->version[0] == 0) {
+ /* version 0: 32-bit duration */
+ duration = ngx_mp4_get_32value(tkhd_atom->duration);
+
+ } else {
+ /* version 1: 64-bit duration */
+ 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);
+
+ duration -= (uint64_t) mp4->start * mp4->timescale / 1000;
+
+ 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;
+ 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 (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 */
+ 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);
+
+ duration -= (uint64_t) mp4->start * timescale / 1000;
+
+ 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->vmhd_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 ((uint64_t) (sizeof(ngx_mp4_stsd_atom_t) - sizeof(ngx_mp4_atom_header_t))
+ > atom_data_size)
+ {
+ ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
+ "\"%s\" mp4 stsd atom too large",
+ 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),
+ 4, stsd_atom->media_name);
+
+ /* supported media format: "avc1" (H.264) and "mp4a" (MPEG-4/AAC) */
+
+ if (ngx_strncmp(stsd_atom->media_name, "avc1", 4) != 0
+ && ngx_strncmp(stsd_atom->media_name, "mp4a", 4) != 0)
+ {
+ return NGX_DECLINED;
+ }
+
+ 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');
+
+ 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);
+
+ atom_table = atom_header + sizeof(ngx_mp4_stts_atom_t);
+ atom_end = atom_table + entries * sizeof(ngx_mp4_stts_entry_t);
+
+ if ((uint64_t) (atom_end - stts_atom->version) > atom_data_size) {
+ ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
+ "\"%s\" mp4 stts atom too large",
+ mp4->file.name.data);
+ return NGX_ERROR;
+ }
+
+ 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;
+ uint32_t entries, count, duration;
+ uint64_t start_time;
+ ngx_buf_t *atom, *data;
+ ngx_uint_t start_sample;
+ ngx_mp4_stts_atom_t *stts_atom;
+ ngx_mp4_stts_entry_t *entry, *end;
+
+ /*
+ * 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;
+ }
+
+ entries = trak->time_to_sample_entries;
+ start_time = mp4->start * trak->timescale / 1000;
+
+ ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
+ "time-to-sample start_time:%uL", start_time);
+
+ 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_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
+ "count:%uD, duration:%uD", count, duration);
+
+ if (start_time < count * duration) {
+ start_sample += (ngx_uint_t) (start_time / duration);
+ count -= start_sample;
+ ngx_mp4_set_32value(entry->count, count);
+ goto found;
+ }
+
+ start_sample += count;
+ start_time -= count * duration;
+ entries--;
+ entry++;
+ }
+
+ 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;
+
+found:
+
+ ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
+ "start_sample:%ui, new count:%uD", start_sample, count);
+
+ trak->start_sample = start_sample;
+
+ data->pos = (u_char *) entry;
+ 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, 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_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');
+
+ 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;
+
+ atom_end = atom_table + entries * sizeof(uint32_t);
+
+ if ((uint64_t) (atom_end - stss_atom->version) > atom_data_size) {
+ ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
+ "\"%s\" mp4 stss atom too large", mp4->file.name.data);
+ return NGX_ERROR;
+ }
+
+ 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 entries, 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;
+ }
+
+ /* sync samples starts from 1 */
+ start_sample = trak->start_sample + 1;
+ 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_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
+ "start:%uD, sync:%uD", start_sample, sample);
+
+ if (sample >= start_sample) {
+ goto found;
+ }
+
+ entries--;
+ entry++;
+ }
+
+ ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
+ "start sample is out of mp4 stss atom in \"%s\"",
+ mp4->file.name.data);
+
+ return NGX_ERROR;
+
+found:
+
+ data->pos = (u_char *) entry;
+
+ start_sample = trak->start_sample;
+
+ while (entry < end) {
+ sample = ngx_mp4_get_32value(entry);
+ sample -= start_sample;
+ ngx_mp4_set_32value(entry, sample);
+ entry++;
+ }
+
+ 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, 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_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');
+
+ 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;
+
+ atom_end = atom_table + entries * sizeof(ngx_mp4_ctts_entry_t);
+
+ if ((uint64_t) (atom_end - ctts_atom->version) > atom_data_size) {
+ ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
+ "\"%s\" mp4 ctts atom too large", mp4->file.name.data);
+ return NGX_ERROR;
+ }
+
+ 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;
+ uint32_t entries, count, start_sample;
+ ngx_buf_t *atom, *data;
+ ngx_mp4_ctts_atom_t *ctts_atom;
+ ngx_mp4_ctts_entry_t *entry, *end;
+
+ /*
+ * 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;
+ }
+
+ /* sync samples starts from 1 */
+ start_sample = trak->start_sample + 1;
+ 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,
+ "start:%uD, count:%uD, offset:%uD",
+ start_sample, count, ngx_mp4_get_32value(entry->offset));
+
+ if (start_sample <= count) {
+ count -= (start_sample - 1);
+ ngx_mp4_set_32value(entry->count, count);
+ goto found;
+ }
+
+ start_sample -= count;
+ entries--;
+ entry++;
+ }
+
+ trak->out[NGX_HTTP_MP4_CTTS_ATOM].buf = NULL;
+ trak->out[NGX_HTTP_MP4_CTTS_DATA].buf = NULL;
+
+ return;
+
+found:
+
+ data->pos = (u_char *) entry;
+ 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, entries);
+
+ return;
+}
+
+
+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');
+
+ 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);
+
+ atom_table = atom_header + sizeof(ngx_mp4_stsc_atom_t);
+ atom_end = atom_table + entries * sizeof(ngx_mp4_stsc_entry_t);
+
+ if ((uint64_t) (atom_end - stsc_atom->version) > atom_data_size) {
+ ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
+ "\"%s\" mp4 stsc atom too large",
+ mp4->file.name.data);
+ return NGX_ERROR;
+ }
+
+ 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 start_sample, entries, chunk, samples, id,
+ next_chunk, n;
+ ngx_buf_t *atom, *data, *buf;
+ ngx_mp4_stsc_atom_t *stsc_atom;
+ ngx_mp4_stsc_entry_t *entry, *first, *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;
+ }
+
+ start_sample = (uint32_t) trak->start_sample;
+ entries = trak->sample_to_chunk_entries - 1;
+
+ 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);
+ entry++;
+
+ while (entry < end) {
+
+ next_chunk = ngx_mp4_get_32value(entry->chunk);
+
+ ngx_log_debug5(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
+ "start_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;
+
+ chunk = next_chunk;
+ samples = ngx_mp4_get_32value(entry->samples);
+ id = ngx_mp4_get_32value(entry->id);
+ entries--;
+ entry++;
+ }
+
+ next_chunk = trak->chunks;
+
+ ngx_log_debug4(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
+ "start_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,
+ "start time is out mp4 stsc chunks in \"%s\"",
+ 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;
+ }
+
+ trak->start_chunk = chunk - 1;
+
+ trak->start_chunk += start_sample / samples;
+ trak->chunk_samples = start_sample % samples;
+
+ ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
+ "start chunk:%ui, samples:%uD",
+ trak->start_chunk, trak->chunk_samples);
+
+ data->pos = (u_char *) entry;
+ atom_size = sizeof(ngx_mp4_stsc_atom_t) + (data->last - data->pos);
+
+ if (trak->chunk_samples) {
+
+ first = &trak->stsc_chunk_entry;
+ ngx_mp4_set_32value(first->chunk, 1);
+ ngx_mp4_set_32value(first->samples, samples - trak->chunk_samples);
+ ngx_mp4_set_32value(first->id, id);
+
+ buf = &trak->stsc_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_CHUNK].buf = buf;
+
+ ngx_mp4_set_32value(entry->chunk, 2);
+
+ atom_size += sizeof(ngx_mp4_stsc_entry_t);
+ }
+
+ while (++entry < end) {
+ chunk = ngx_mp4_get_32value(entry->chunk);
+ chunk -= trak->start_chunk;
+ ngx_mp4_set_32value(entry->chunk, chunk);
+ }
+
+ 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, 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');
+
+ 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) {
+ atom_end = atom_table + entries * sizeof(uint32_t);
+
+ if ((uint64_t) (atom_end - stsz_atom->version) > atom_data_size) {
+ ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
+ "\"%s\" mp4 stsz atom too large",
+ mp4->file.name.data);
+ return NGX_ERROR;
+ }
+
+ 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 void
+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;
+ 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) {
+ data->pos += trak->start_sample * sizeof(uint32_t);
+ end = (uint32_t *) data->pos;
+
+ for (pos = end - trak->chunk_samples; pos < end; pos++) {
+ trak->chunk_samples_size += ngx_mp4_get_32value(pos);
+ }
+
+ ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
+ "chunk samples sizes:%uL", trak->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,
+ trak->sample_sizes_entries - trak->start_sample);
+ }
+}
+
+
+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');
+
+ entries = ngx_mp4_get_32value(stco_atom->entries);
+
+ ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "chunks:%uD", entries);
+
+ atom_table = atom_header + sizeof(ngx_mp4_stco_atom_t);
+ atom_end = atom_table + entries * sizeof(uint32_t);
+
+ if ((uint64_t) (atom_end - stco_atom->version) > atom_data_size) {
+ ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
+ "\"%s\" mp4 stco atom too large", mp4->file.name.data);
+ return NGX_ERROR;
+ }
+
+ 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;
+ 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;
+ }
+
+ data->pos += trak->start_chunk * sizeof(uint32_t);
+ atom_size = sizeof(ngx_mp4_stco_atom_t) + (data->last - data->pos);
+ trak->size += atom_size;
+
+ trak->start_offset = ngx_mp4_get_32value(data->pos);
+ trak->start_offset += trak->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:%uD", trak->start_offset);
+
+ 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, trak->chunks - trak->start_chunk);
+
+ 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');
+
+ entries = ngx_mp4_get_32value(co64_atom->entries);
+
+ ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "chunks:%uD", entries);
+
+ atom_table = atom_header + sizeof(ngx_mp4_co64_atom_t);
+ atom_end = atom_table + entries * sizeof(uint64_t);
+
+ if ((uint64_t) (atom_end - co64_atom->version) > atom_data_size) {
+ ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
+ "\"%s\" mp4 co64 atom too large", mp4->file.name.data);
+ return NGX_ERROR;
+ }
+
+ 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;
+ 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;
+ }
+
+ data->pos += trak->start_chunk * sizeof(uint64_t);
+ atom_size = sizeof(ngx_mp4_co64_atom_t) + (data->last - data->pos);
+ trak->size += atom_size;
+
+ trak->start_offset = ngx_mp4_get_64value(data->pos);
+ trak->start_offset += trak->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:%uL", trak->start_offset);
+
+ 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, trak->chunks - trak->start_chunk);
+
+ 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;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-27 19:13:53 +0000