forked from kaltura/nginx-vod-module
/
ngx_http_vod_mss.c
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/
ngx_http_vod_mss.c
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#include <ngx_http.h>
#include "ngx_http_vod_submodule.h"
#include "ngx_http_vod_utils.h"
#include "ngx_http_vod_udrm.h"
#include "vod/mss/mss_packager.h"
#include "vod/mss/mss_playready.h"
// typedefs
typedef struct {
uint64_t bitrate;
uint64_t time;
ngx_str_t media_type;
} fragment_params_t;
// constants
static const ngx_http_vod_match_definition_t fragment_match_definition[] = {
{ MATCH_FIXED_STRING, 0, 0, ngx_string("QualityLevels(") },
{ MATCH_NUMBER, offsetof(fragment_params_t, bitrate), 0, ngx_null_string },
{ MATCH_FIXED_STRING, 0, 0, ngx_string(")/Fragments(") },
{ MATCH_DELIM_STRING, offsetof(fragment_params_t, media_type), '=',ngx_null_string },
{ MATCH_NUMBER, offsetof(fragment_params_t, time), 0, ngx_null_string },
{ MATCH_FIXED_STRING, 0, 0, ngx_string(")") },
{ MATCH_END, 0, 0, ngx_null_string },
};
// content types
static u_char mp4_audio_content_type[] = "audio/mp4";
static u_char mp4_video_content_type[] = "video/mp4";
static u_char manifest_content_type[] = "text/xml";
static ngx_int_t
ngx_http_vod_mss_handle_manifest(
ngx_http_vod_submodule_context_t* submodule_context,
ngx_str_t* response,
ngx_str_t* content_type)
{
vod_status_t rc;
if (submodule_context->conf->drm_enabled)
{
rc = mss_playready_build_manifest(
&submodule_context->request_context,
&submodule_context->conf->segmenter,
&submodule_context->mpeg_metadata,
response);
}
else
{
rc = mss_packager_build_manifest(
&submodule_context->request_context,
&submodule_context->conf->segmenter,
&submodule_context->mpeg_metadata,
0,
NULL,
NULL,
response);
}
if (rc != VOD_OK)
{
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, submodule_context->request_context.log, 0,
"ngx_http_vod_mss_handle_manifest: mss_packager_build_manifest failed %i", rc);
return ngx_http_vod_status_to_ngx_error(rc);
}
content_type->data = manifest_content_type;
content_type->len = sizeof(manifest_content_type) - 1;
return NGX_OK;
}
static ngx_int_t
ngx_http_vod_mss_init_frame_processor(
ngx_http_vod_submodule_context_t* submodule_context,
read_cache_state_t* read_cache_state,
segment_writer_t* segment_writer,
ngx_http_vod_frame_processor_t* frame_processor,
void** frame_processor_state,
ngx_str_t* output_buffer,
size_t* response_size,
ngx_str_t* content_type)
{
fragment_writer_state_t* state;
segment_writer_t drm_writer;
vod_status_t rc;
bool_t size_only = ngx_http_vod_submodule_size_only(submodule_context);
if (submodule_context->conf->drm_enabled)
{
rc = mss_playready_get_fragment_writer(
&drm_writer,
&submodule_context->request_context,
submodule_context->mpeg_metadata.first_stream,
submodule_context->request_params.segment_index,
segment_writer,
submodule_context->cur_suburi->file_key, // iv
size_only,
output_buffer,
response_size);
if (rc != VOD_OK)
{
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, submodule_context->request_context.log, 0,
"ngx_http_vod_mss_init_frame_processor: mss_playready_get_fragment_writer failed %i", rc);
return ngx_http_vod_status_to_ngx_error(rc);
}
segment_writer = &drm_writer;
}
else
{
rc = mss_packager_build_fragment_header(
&submodule_context->request_context,
submodule_context->mpeg_metadata.first_stream,
submodule_context->request_params.segment_index,
0,
NULL,
NULL,
size_only,
output_buffer,
response_size);
if (rc != VOD_OK)
{
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, submodule_context->request_context.log, 0,
"ngx_http_vod_mss_init_frame_processor: mss_packager_build_fragment_header failed %i", rc);
return ngx_http_vod_status_to_ngx_error(rc);
}
}
if (!size_only || *response_size == 0)
{
rc = mp4_builder_frame_writer_init(
&submodule_context->request_context,
submodule_context->mpeg_metadata.first_stream,
read_cache_state,
segment_writer->write_tail,
segment_writer->context,
&state);
if (rc != VOD_OK)
{
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, submodule_context->request_context.log, 0,
"ngx_http_vod_mss_init_frame_processor: mp4_builder_frame_writer_init failed %i", rc);
return ngx_http_vod_status_to_ngx_error(rc);
}
*frame_processor = (ngx_http_vod_frame_processor_t)mp4_builder_frame_writer_process;
*frame_processor_state = state;
}
// set the 'Content-type' header
if (submodule_context->mpeg_metadata.stream_count[MEDIA_TYPE_VIDEO])
{
content_type->len = sizeof(mp4_video_content_type) - 1;
content_type->data = mp4_video_content_type;
}
else
{
content_type->len = sizeof(mp4_audio_content_type) - 1;
content_type->data = mp4_audio_content_type;
}
return NGX_OK;
}
static const ngx_http_vod_request_t mss_manifest_request = {
0,
PARSE_FLAG_TOTAL_SIZE_ESTIMATE | PARSE_FLAG_PARSED_EXTRA_DATA,
mss_packager_compare_streams,
offsetof(ngx_http_vod_loc_conf_t, duplicate_bitrate_threshold),
REQUEST_CLASS_MANIFEST,
ngx_http_vod_mss_handle_manifest,
NULL,
};
static const ngx_http_vod_request_t mss_fragment_request = {
REQUEST_FLAG_SINGLE_STREAM,
PARSE_FLAG_FRAMES_ALL,
NULL,
0,
REQUEST_CLASS_SEGMENT,
NULL,
ngx_http_vod_mss_init_frame_processor,
};
static const ngx_http_vod_request_t mss_playready_fragment_request = {
REQUEST_FLAG_SINGLE_STREAM,
PARSE_FLAG_FRAMES_ALL | PARSE_FLAG_PARSED_EXTRA_DATA,
NULL,
0,
REQUEST_CLASS_SEGMENT,
NULL,
ngx_http_vod_mss_init_frame_processor,
};
void
ngx_http_vod_mss_create_loc_conf(
ngx_conf_t *cf,
ngx_http_vod_mss_loc_conf_t *conf)
{
}
static char *
ngx_http_vod_mss_merge_loc_conf(
ngx_conf_t *cf,
ngx_http_vod_loc_conf_t *base,
ngx_http_vod_mss_loc_conf_t *conf,
ngx_http_vod_mss_loc_conf_t *prev)
{
ngx_conf_merge_str_value(conf->manifest_file_name_prefix, prev->manifest_file_name_prefix, "manifest");
return NGX_CONF_OK;
}
int
ngx_http_vod_mss_get_file_path_components(ngx_str_t* uri)
{
u_char* end_pos = uri->data + uri->len;
if (end_pos[-1] == ')')
{
// parse "QualityLevels(2364883)/Fragments(video=0)" as the file part of the path
return 2;
}
else
{
return 1;
}
}
ngx_int_t
ngx_http_vod_mss_parse_uri_file_name(
ngx_http_request_t *r,
ngx_http_vod_loc_conf_t *conf,
u_char* start_pos,
u_char* end_pos,
ngx_http_vod_request_params_t* request_params)
{
fragment_params_t fragment_params;
ngx_int_t rc;
// fragment
if (end_pos[-1] == ')')
{
if (!ngx_http_vod_parse_string(fragment_match_definition, start_pos, end_pos, &fragment_params))
{
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"ngx_http_vod_mss_parse_uri_file_name: ngx_http_vod_parse_string failed");
return NGX_HTTP_BAD_REQUEST;
}
if (fragment_params.media_type.len != sizeof(MSS_STREAM_TYPE_VIDEO) - 1)
{
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"ngx_http_vod_mss_parse_uri_file_name: invalid media type length %uz", fragment_params.media_type.len);
return NGX_HTTP_BAD_REQUEST;
}
request_params->required_files = (1 << MSS_FILE_INDEX(fragment_params.bitrate));
if (ngx_memcmp(fragment_params.media_type.data, MSS_STREAM_TYPE_VIDEO, sizeof(MSS_STREAM_TYPE_VIDEO) - 1) == 0)
{
request_params->required_tracks[MEDIA_TYPE_VIDEO] = (1 << MSS_TRACK_INDEX(fragment_params.bitrate));
}
else if (ngx_memcmp(fragment_params.media_type.data, MSS_STREAM_TYPE_AUDIO, sizeof(MSS_STREAM_TYPE_AUDIO) - 1) == 0)
{
request_params->required_tracks[MEDIA_TYPE_AUDIO] = (1 << MSS_TRACK_INDEX(fragment_params.bitrate));
}
else
{
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"ngx_http_vod_mss_parse_uri_file_name: invalid media type %V", &fragment_params.media_type);
return NGX_HTTP_BAD_REQUEST;
}
request_params->segment_index = segmenter_get_segment_index(&conf->segmenter, fragment_params.time / 10000);
request_params->request = conf->drm_enabled ? &mss_playready_fragment_request : &mss_fragment_request;
return NGX_OK;
}
// manifest
if (!ngx_http_vod_starts_with(start_pos, end_pos, &conf->mss.manifest_file_name_prefix))
{
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"ngx_http_vod_mss_parse_uri_file_name: unidentified request");
return NGX_HTTP_BAD_REQUEST;
}
request_params->request = &mss_manifest_request;
start_pos += conf->mss.manifest_file_name_prefix.len;
rc = ngx_http_vod_parse_uri_file_name(r, start_pos, end_pos, FALSE, request_params);
if (rc != NGX_OK)
{
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"ngx_http_vod_mss_parse_uri_file_name: ngx_http_vod_parse_uri_file_name failed %i", rc);
return rc;
}
return NGX_OK;
}
ngx_int_t
ngx_http_vod_mss_parse_drm_info(
ngx_http_vod_submodule_context_t* submodule_context,
ngx_str_t* drm_info,
void** output)
{
return ngx_http_vod_udrm_parse_response(
&submodule_context->request_context,
drm_info,
output);
}
DEFINE_SUBMODULE(mss);