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ngx_http_vod_hls.c
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ngx_http_vod_hls.c
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#include <ngx_http.h>
#include <ngx_md5.h>
#include "ngx_http_vod_submodule.h"
#include "ngx_http_vod_utils.h"
#include "vod/subtitle/webvtt_builder.h"
#include "vod/hls/hls_muxer.h"
#include "vod/mp4/mp4_muxer.h"
#include "vod/mp4/mp4_fragment.h"
#include "vod/mp4/mp4_init_segment.h"
#include "vod/udrm.h"
#if (NGX_HAVE_OPENSSL_EVP)
#include "vod/dash/edash_packager.h"
#include "vod/mp4/mp4_cbcs_encrypt.h"
#include "vod/hls/aes_cbc_encrypt.h"
#endif // NGX_HAVE_OPENSSL_EVP
// constants
#define SUPPORTED_CODECS \
(VOD_CODEC_FLAG(AVC) | \
VOD_CODEC_FLAG(HEVC) | \
VOD_CODEC_FLAG(AAC) | \
VOD_CODEC_FLAG(AC3) | \
VOD_CODEC_FLAG(EAC3) | \
VOD_CODEC_FLAG(MP3) | \
VOD_CODEC_FLAG(DTS) | \
VOD_CODEC_FLAG(FLAC))
// content types
static u_char m3u8_content_type[] = "application/vnd.apple.mpegurl";
static u_char encryption_key_content_type[] = "application/octet-stream";
static u_char mpeg_ts_content_type[] = "video/MP2T";
static u_char vtt_content_type[] = "text/vtt";
static const u_char ts_file_ext[] = ".ts";
static const u_char m4s_file_ext[] = ".m4s";
static const u_char vtt_file_ext[] = ".vtt";
static const u_char mp4_file_ext[] = ".mp4";
static const u_char m3u8_file_ext[] = ".m3u8";
static const u_char key_file_ext[] = ".key";
// constants
static ngx_str_t empty_string = ngx_null_string;
ngx_conf_enum_t hls_encryption_methods[] = {
{ ngx_string("none"), HLS_ENC_NONE },
{ ngx_string("aes-128"), HLS_ENC_AES_128 },
{ ngx_string("sample-aes"), HLS_ENC_SAMPLE_AES },
{ ngx_string("sample-aes-cenc"), HLS_ENC_SAMPLE_AES_CENC },
{ ngx_null_string, 0 }
};
ngx_conf_enum_t hls_container_formats[] = {
{ ngx_string("auto"), HLS_CONTAINER_AUTO },
{ ngx_string("mpegts"), HLS_CONTAINER_MPEGTS },
{ ngx_string("fmp4"), HLS_CONTAINER_FMP4 },
{ ngx_null_string, 0 }
};
static ngx_uint_t
ngx_http_vod_hls_get_container_format(
ngx_http_vod_hls_loc_conf_t* conf,
media_set_t* media_set)
{
if (conf->m3u8_config.container_format != HLS_CONTAINER_AUTO)
{
return conf->m3u8_config.container_format;
}
if (media_set->filtered_tracks[0].media_info.codec_id == VOD_CODEC_ID_HEVC ||
conf->encryption_method == HLS_ENC_SAMPLE_AES_CENC)
{
return HLS_CONTAINER_FMP4;
}
return HLS_CONTAINER_MPEGTS;
}
#if (NGX_HAVE_OPENSSL_EVP)
// some random salt to prevent the iv from being equal to key in case encryption_iv_seed is null
static u_char iv_salt[] = { 0xa7, 0xc6, 0x17, 0xab, 0x52, 0x2c, 0x40, 0x3c, 0xf6, 0x8a };
static void
ngx_http_vod_hls_init_encryption_iv(u_char* iv, uint32_t segment_index)
{
u_char* p;
// the IV is the segment index in big endian
vod_memzero(iv, AES_BLOCK_SIZE - sizeof(uint32_t));
segment_index++;
p = iv + AES_BLOCK_SIZE - sizeof(uint32_t);
*p++ = (u_char)(segment_index >> 24);
*p++ = (u_char)(segment_index >> 16);
*p++ = (u_char)(segment_index >> 8);
*p++ = (u_char)(segment_index);
}
static ngx_int_t
ngx_http_vod_hls_get_iv_seed(
ngx_http_vod_submodule_context_t* submodule_context,
media_sequence_t* sequence,
ngx_str_t* result)
{
ngx_http_vod_loc_conf_t* conf = submodule_context->conf;
ngx_http_complex_value_t* value;
if (conf->encryption_iv_seed != NULL)
{
value = conf->encryption_iv_seed;
}
else if (conf->secret_key != NULL)
{
value = conf->secret_key;
}
else
{
*result = sequence->mapped_uri;
return NGX_OK;
}
if (ngx_http_complex_value(
submodule_context->r,
value,
result) != NGX_OK)
{
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, submodule_context->request_context.log, 0,
"ngx_http_vod_hls_get_iv_seed: ngx_http_complex_value failed");
return NGX_ERROR;
}
return NGX_OK;
}
static ngx_int_t
ngx_http_vod_hls_init_encryption_params(
hls_encryption_params_t* encryption_params,
ngx_http_vod_submodule_context_t* submodule_context,
ngx_uint_t container_format)
{
ngx_http_vod_loc_conf_t* conf = submodule_context->conf;
media_sequence_t* sequence;
drm_info_t* drm_info;
ngx_str_t iv_seed;
ngx_md5_t md5;
ngx_int_t rc;
encryption_params->type = conf->hls.encryption_method;
if (encryption_params->type == HLS_ENC_NONE)
{
return NGX_OK;
}
encryption_params->iv = encryption_params->iv_buf;
encryption_params->return_iv = FALSE;
sequence = &submodule_context->media_set.sequences[0];
if (conf->drm_enabled)
{
drm_info = sequence->drm_info;
encryption_params->key = drm_info->key;
if (drm_info->iv_set)
{
encryption_params->iv = drm_info->iv;
return NGX_OK;
}
}
else
{
encryption_params->key = sequence->encryption_key;
}
if (container_format != HLS_CONTAINER_FMP4 || encryption_params->type != HLS_ENC_AES_128)
{
ngx_http_vod_hls_init_encryption_iv(
encryption_params->iv_buf,
submodule_context->request_params.segment_index);
return NGX_OK;
}
// must generate an iv in this case
rc = ngx_http_vod_hls_get_iv_seed(
submodule_context,
sequence,
&iv_seed);
if (rc != NGX_OK)
{
return rc;
}
ngx_md5_init(&md5);
ngx_md5_update(&md5, iv_salt, sizeof(iv_salt));
ngx_md5_update(&md5, iv_seed.data, iv_seed.len);
ngx_md5_final(encryption_params->iv_buf, &md5);
encryption_params->return_iv = TRUE;
return NGX_OK;
}
static ngx_int_t
ngx_http_vod_hls_init_segment_encryption(
ngx_http_vod_submodule_context_t* submodule_context,
segment_writer_t* segment_writer,
ngx_uint_t container_format,
hls_encryption_params_t* encryption_params)
{
aes_cbc_encrypt_context_t* encrypted_write_context;
buffer_pool_t* buffer_pool;
vod_status_t rc;
rc = ngx_http_vod_hls_init_encryption_params(encryption_params, submodule_context, container_format);
if (rc != NGX_OK)
{
return rc;
}
if (encryption_params->type != HLS_ENC_AES_128)
{
return NGX_OK;
}
if (container_format == HLS_CONTAINER_MPEGTS)
{
buffer_pool = submodule_context->request_context.output_buffer_pool;
}
else
{
// Note: should not use buffer pool for fmp4 since the buffers have varying sizes
buffer_pool = NULL;
}
rc = aes_cbc_encrypt_init(
&encrypted_write_context,
&submodule_context->request_context,
segment_writer->write_tail,
segment_writer->context,
buffer_pool,
encryption_params->key,
encryption_params->iv);
if (rc != VOD_OK)
{
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, submodule_context->request_context.log, 0,
"ngx_http_vod_hls_init_segment_encryption: aes_cbc_encrypt_init failed %i", rc);
return ngx_http_vod_status_to_ngx_error(submodule_context->r, rc);
}
segment_writer->write_tail = (write_callback_t)aes_cbc_encrypt_write;
segment_writer->context = encrypted_write_context;
return NGX_OK;
}
#endif // NGX_HAVE_OPENSSL_EVP
static ngx_int_t
ngx_http_vod_hls_handle_master_playlist(
ngx_http_vod_submodule_context_t* submodule_context,
ngx_str_t* response,
ngx_str_t* content_type)
{
ngx_http_vod_loc_conf_t* conf = submodule_context->conf;
ngx_str_t base_url = ngx_null_string;
vod_status_t rc;
if (conf->hls.absolute_master_urls)
{
rc = ngx_http_vod_get_base_url(submodule_context->r, conf->base_url, &empty_string, &base_url);
if (rc != NGX_OK)
{
return rc;
}
}
rc = m3u8_builder_build_master_playlist(
&submodule_context->request_context,
&conf->hls.m3u8_config,
conf->hls.encryption_method,
&base_url,
&submodule_context->media_set,
response);
if (rc != VOD_OK)
{
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, submodule_context->request_context.log, 0,
"ngx_http_vod_hls_handle_master_playlist: m3u8_builder_build_master_playlist failed %i", rc);
return ngx_http_vod_status_to_ngx_error(submodule_context->r, rc);
}
content_type->data = m3u8_content_type;
content_type->len = sizeof(m3u8_content_type) - 1;
return NGX_OK;
}
static ngx_int_t
ngx_http_vod_hls_handle_index_playlist(
ngx_http_vod_submodule_context_t* submodule_context,
ngx_str_t* response,
ngx_str_t* content_type)
{
ngx_http_vod_loc_conf_t* conf = submodule_context->conf;
hls_encryption_params_t encryption_params;
ngx_uint_t container_format;
ngx_str_t segments_base_url = ngx_null_string;
ngx_str_t base_url = ngx_null_string;
vod_status_t rc;
if (conf->hls.absolute_index_urls)
{
rc = ngx_http_vod_get_base_url(submodule_context->r, conf->base_url, &submodule_context->r->uri, &base_url);
if (rc != NGX_OK)
{
return rc;
}
if (conf->segments_base_url != NULL)
{
rc = ngx_http_vod_get_base_url(
submodule_context->r,
conf->segments_base_url,
&submodule_context->r->uri,
&segments_base_url);
if (rc != NGX_OK)
{
return rc;
}
}
else
{
segments_base_url = base_url;
}
}
container_format = ngx_http_vod_hls_get_container_format(
&conf->hls,
&submodule_context->media_set);
#if (NGX_HAVE_OPENSSL_EVP)
rc = ngx_http_vod_hls_init_encryption_params(&encryption_params, submodule_context, container_format);
if (rc != NGX_OK)
{
return rc;
}
if (encryption_params.type != HLS_ENC_NONE)
{
if (conf->hls.encryption_key_uri != NULL)
{
if (ngx_http_complex_value(
submodule_context->r,
conf->hls.encryption_key_uri,
&encryption_params.key_uri) != NGX_OK)
{
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, submodule_context->request_context.log, 0,
"ngx_http_vod_hls_handle_index_playlist: ngx_http_complex_value failed");
return NGX_ERROR;
}
}
else
{
encryption_params.key_uri.len = 0;
}
}
#else
encryption_params.type = HLS_ENC_NONE;
#endif // NGX_HAVE_OPENSSL_EVP
rc = m3u8_builder_build_index_playlist(
&submodule_context->request_context,
&conf->hls.m3u8_config,
&base_url,
&segments_base_url,
&encryption_params,
container_format,
&submodule_context->media_set,
response);
if (rc != VOD_OK)
{
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, submodule_context->request_context.log, 0,
"ngx_http_vod_hls_handle_index_playlist: m3u8_builder_build_index_playlist failed %i", rc);
return ngx_http_vod_status_to_ngx_error(submodule_context->r, rc);
}
content_type->data = m3u8_content_type;
content_type->len = sizeof(m3u8_content_type) - 1;
return NGX_OK;
}
static ngx_int_t
ngx_http_vod_hls_handle_iframe_playlist(
ngx_http_vod_submodule_context_t* submodule_context,
ngx_str_t* response,
ngx_str_t* content_type)
{
ngx_http_vod_loc_conf_t* conf = submodule_context->conf;
ngx_str_t base_url = ngx_null_string;
vod_status_t rc;
if (conf->hls.encryption_method != HLS_ENC_NONE)
{
ngx_log_error(NGX_LOG_ERR, submodule_context->request_context.log, 0,
"ngx_http_vod_hls_handle_iframe_playlist: iframes playlist not supported with encryption");
return ngx_http_vod_status_to_ngx_error(submodule_context->r, VOD_BAD_REQUEST);
}
if (submodule_context->media_set.audio_filtering_needed)
{
ngx_log_error(NGX_LOG_ERR, submodule_context->request_context.log, 0,
"ngx_http_vod_hls_handle_iframe_playlist: iframes playlist not supported with audio filtering");
return ngx_http_vod_status_to_ngx_error(submodule_context->r, VOD_BAD_REQUEST);
}
if (conf->hls.absolute_iframe_urls)
{
rc = ngx_http_vod_get_base_url(submodule_context->r, conf->base_url, &submodule_context->r->uri, &base_url);
if (rc != NGX_OK)
{
return rc;
}
}
if (ngx_http_vod_hls_get_container_format(
&conf->hls,
&submodule_context->media_set) == HLS_CONTAINER_FMP4)
{
ngx_log_error(NGX_LOG_ERR, submodule_context->request_context.log, 0,
"ngx_http_vod_hls_handle_iframe_playlist: iframes playlist not supported with fmp4 container");
return ngx_http_vod_status_to_ngx_error(submodule_context->r, VOD_BAD_REQUEST);
}
rc = m3u8_builder_build_iframe_playlist(
&submodule_context->request_context,
&conf->hls.m3u8_config,
&conf->hls.mpegts_muxer_config,
&base_url,
&submodule_context->media_set,
response);
if (rc != VOD_OK)
{
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, submodule_context->request_context.log, 0,
"ngx_http_vod_hls_handle_iframe_playlist: m3u8_builder_build_iframe_playlist failed %i", rc);
return ngx_http_vod_status_to_ngx_error(submodule_context->r, rc);
}
content_type->data = m3u8_content_type;
content_type->len = sizeof(m3u8_content_type) - 1;
return NGX_OK;
}
static ngx_int_t
ngx_http_vod_hls_handle_encryption_key(
ngx_http_vod_submodule_context_t* submodule_context,
ngx_str_t* response,
ngx_str_t* content_type)
{
u_char* encryption_key;
encryption_key = ngx_palloc(submodule_context->request_context.pool, BUFFER_CACHE_KEY_SIZE);
if (encryption_key == NULL)
{
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, submodule_context->request_context.log, 0,
"ngx_http_vod_hls_handle_encryption_key: ngx_palloc failed");
return ngx_http_vod_status_to_ngx_error(submodule_context->r, VOD_ALLOC_FAILED);
}
ngx_memcpy(encryption_key, submodule_context->media_set.sequences[0].encryption_key, BUFFER_CACHE_KEY_SIZE);
response->data = encryption_key;
response->len = BUFFER_CACHE_KEY_SIZE;
content_type->data = encryption_key_content_type;
content_type->len = sizeof(encryption_key_content_type) - 1;
return NGX_OK;
}
static ngx_int_t
ngx_http_vod_hls_init_ts_frame_processor(
ngx_http_vod_submodule_context_t* submodule_context,
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)
{
hls_encryption_params_t encryption_params;
hls_muxer_state_t* state;
vod_status_t rc;
bool_t reuse_output_buffers;
#if (NGX_HAVE_OPENSSL_EVP)
rc = ngx_http_vod_hls_init_segment_encryption(
submodule_context,
segment_writer,
HLS_CONTAINER_MPEGTS,
&encryption_params);
if (rc != NGX_OK)
{
return rc;
}
if (encryption_params.type == HLS_ENC_SAMPLE_AES_CENC)
{
ngx_log_error(NGX_LOG_ERR, submodule_context->request_context.log, 0,
"ngx_http_vod_hls_init_ts_frame_processor: sample aes cenc not supported with mpeg ts container");
return ngx_http_vod_status_to_ngx_error(submodule_context->r, VOD_BAD_REQUEST);
}
reuse_output_buffers = encryption_params.type == HLS_ENC_AES_128;
#else
encryption_params.type = HLS_ENC_NONE;
reuse_output_buffers = FALSE;
#endif // NGX_HAVE_OPENSSL_EVP
rc = hls_muxer_init_segment(
&submodule_context->request_context,
&submodule_context->conf->hls.mpegts_muxer_config,
&encryption_params,
submodule_context->request_params.segment_index,
&submodule_context->media_set,
segment_writer->write_tail,
segment_writer->context,
reuse_output_buffers,
response_size,
output_buffer,
&state);
if (rc != VOD_OK)
{
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, submodule_context->request_context.log, 0,
"ngx_http_vod_hls_init_ts_frame_processor: hls_muxer_init failed %i", rc);
return ngx_http_vod_status_to_ngx_error(submodule_context->r, rc);
}
if (encryption_params.type == HLS_ENC_AES_128 &&
*response_size != 0)
{
*response_size = aes_round_up_to_block(*response_size);
}
*frame_processor = (ngx_http_vod_frame_processor_t)hls_muxer_process;
*frame_processor_state = state;
content_type->len = sizeof(mpeg_ts_content_type) - 1;
content_type->data = (u_char *)mpeg_ts_content_type;
return NGX_OK;
}
static ngx_int_t
ngx_http_vod_hls_handle_mp4_init_segment(
ngx_http_vod_submodule_context_t* submodule_context,
ngx_str_t* response,
ngx_str_t* content_type)
{
atom_writer_t* stsd_atom_writers = NULL;
vod_status_t rc;
#if (NGX_HAVE_OPENSSL_EVP)
aes_cbc_encrypt_context_t* encrypted_write_context;
hls_encryption_params_t encryption_params;
drm_info_t* drm_info;
rc = ngx_http_vod_hls_init_encryption_params(&encryption_params, submodule_context, HLS_CONTAINER_FMP4);
if (rc != NGX_OK)
{
return rc;
}
switch (encryption_params.type)
{
case HLS_ENC_SAMPLE_AES:
rc = mp4_init_segment_get_encrypted_stsd_writers(
&submodule_context->request_context,
&submodule_context->media_set,
SCHEME_TYPE_CBCS,
FALSE,
NULL,
encryption_params.iv,
&stsd_atom_writers);
if (rc != VOD_OK)
{
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, submodule_context->request_context.log, 0,
"ngx_http_vod_hls_handle_mp4_init_segment: mp4_init_segment_get_encrypted_stsd_writers failed %i (1)", rc);
return ngx_http_vod_status_to_ngx_error(submodule_context->r, rc);
}
break;
case HLS_ENC_SAMPLE_AES_CENC:
drm_info = (drm_info_t*)submodule_context->media_set.sequences[0].drm_info;
rc = mp4_init_segment_get_encrypted_stsd_writers(
&submodule_context->request_context,
&submodule_context->media_set,
SCHEME_TYPE_CENC,
FALSE,
drm_info->key_id,
NULL,
&stsd_atom_writers);
if (rc != VOD_OK)
{
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, submodule_context->request_context.log, 0,
"ngx_http_vod_hls_handle_mp4_init_segment: mp4_init_segment_get_encrypted_stsd_writers failed %i (2)", rc);
return ngx_http_vod_status_to_ngx_error(submodule_context->r, rc);
}
break;
default:;
}
#endif // NGX_HAVE_OPENSSL_EVP
rc = mp4_init_segment_build(
&submodule_context->request_context,
&submodule_context->media_set,
ngx_http_vod_submodule_size_only(submodule_context),
NULL,
stsd_atom_writers,
response);
if (rc != VOD_OK)
{
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, submodule_context->request_context.log, 0,
"ngx_http_vod_hls_handle_mp4_init_segment: mp4_init_segment_build failed %i", rc);
return ngx_http_vod_status_to_ngx_error(submodule_context->r, rc);
}
#if (NGX_HAVE_OPENSSL_EVP)
if (encryption_params.type == HLS_ENC_AES_128)
{
rc = aes_cbc_encrypt_init(
&encrypted_write_context,
&submodule_context->request_context,
NULL,
NULL,
NULL,
encryption_params.key,
encryption_params.iv);
if (rc != VOD_OK)
{
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, submodule_context->request_context.log, 0,
"ngx_http_vod_hls_handle_mp4_init_segment: aes_cbc_encrypt_init failed %i", rc);
return ngx_http_vod_status_to_ngx_error(submodule_context->r, rc);
}
rc = aes_cbc_encrypt(
encrypted_write_context,
response,
response,
TRUE);
if (rc != VOD_OK)
{
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, submodule_context->request_context.log, 0,
"ngx_http_vod_hls_handle_mp4_init_segment: aes_cbc_encrypt failed %i", rc);
return ngx_http_vod_status_to_ngx_error(submodule_context->r, rc);
}
}
#endif // NGX_HAVE_OPENSSL_EVP
mp4_fragment_get_content_type(
submodule_context->media_set.track_count[MEDIA_TYPE_VIDEO],
content_type);
return NGX_OK;
}
static ngx_int_t
ngx_http_vod_hls_init_fmp4_frame_processor(
ngx_http_vod_submodule_context_t* submodule_context,
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)
{
dash_fragment_header_extensions_t header_extensions;
fragment_writer_state_t* state;
mp4_muxer_state_t* muxer_state;
segment_writer_t* segment_writers;
vod_status_t rc;
bool_t per_stream_writer;
bool_t reuse_input_buffers = FALSE;
bool_t size_only = ngx_http_vod_submodule_size_only(submodule_context);
#if (NGX_HAVE_OPENSSL_EVP)
ngx_http_vod_loc_conf_t* conf = submodule_context->conf;
hls_encryption_params_t encryption_params;
segment_writer_t drm_writer;
rc = ngx_http_vod_hls_init_segment_encryption(
submodule_context,
segment_writer,
HLS_CONTAINER_FMP4,
&encryption_params);
if (rc != NGX_OK)
{
return rc;
}
reuse_input_buffers = encryption_params.type != HLS_ENC_NONE;
if (conf->hls.encryption_method == HLS_ENC_SAMPLE_AES)
{
rc = mp4_cbcs_encrypt_get_writers(
&submodule_context->request_context,
&submodule_context->media_set,
segment_writer,
encryption_params.key,
encryption_params.iv,
&segment_writers);
if (rc != VOD_OK)
{
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, submodule_context->request_context.log, 0,
"ngx_http_vod_hls_init_fmp4_frame_processor: mp4_cbcs_encrypt_get_writers failed %i", rc);
return ngx_http_vod_status_to_ngx_error(submodule_context->r, rc);
}
per_stream_writer = TRUE;
}
else
#endif // NGX_HAVE_OPENSSL_EVP
{
segment_writers = segment_writer;
per_stream_writer = FALSE;
}
if (submodule_context->media_set.total_track_count > 1)
{
#if (NGX_HAVE_OPENSSL_EVP)
if (encryption_params.type == HLS_ENC_SAMPLE_AES_CENC)
{
ngx_log_error(NGX_LOG_ERR, submodule_context->request_context.log, 0,
"ngx_http_vod_hls_init_fmp4_frame_processor: multiple streams not supported for sample aes cenc");
return ngx_http_vod_status_to_ngx_error(submodule_context->r, VOD_BAD_REQUEST);
}
#endif // NGX_HAVE_OPENSSL_EVP
// muxed segment
rc = mp4_muxer_init_fragment(
&submodule_context->request_context,
submodule_context->request_params.segment_index,
&submodule_context->media_set,
segment_writers,
per_stream_writer,
reuse_input_buffers,
size_only,
output_buffer,
response_size,
&muxer_state);
if (rc != VOD_OK)
{
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, submodule_context->request_context.log, 0,
"ngx_http_vod_hls_init_fmp4_frame_processor: mp4_muxer_init_fragment failed %i", rc);
return ngx_http_vod_status_to_ngx_error(submodule_context->r, rc);
}
*frame_processor = (ngx_http_vod_frame_processor_t)mp4_muxer_process_frames;
*frame_processor_state = muxer_state;
}
else
{
#if (NGX_HAVE_OPENSSL_EVP)
if (encryption_params.type == HLS_ENC_SAMPLE_AES_CENC)
{
drm_writer = *segment_writer; // must not change segment_writer, otherwise the header will be encrypted
// encyrpted fragment
rc = edash_packager_get_fragment_writer(
&drm_writer,
&submodule_context->request_context,
&submodule_context->media_set,
submodule_context->request_params.segment_index,
conf->min_single_nalu_per_frame_segment > 0 &&
submodule_context->media_set.initial_segment_clip_relative_index >= conf->min_single_nalu_per_frame_segment - 1,
submodule_context->media_set.sequences[0].encryption_key, // iv
size_only,
output_buffer,
response_size);
switch (rc)
{
case VOD_DONE: // passthrough
break;
case VOD_OK:
segment_writers = &drm_writer;
break;
default:
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, submodule_context->request_context.log, 0,
"ngx_http_vod_hls_init_fmp4_frame_processor: edash_packager_get_fragment_writer failed %i", rc);
return ngx_http_vod_status_to_ngx_error(submodule_context->r, rc);
}
}
else
#endif // NGX_HAVE_OPENSSL_EVP
{
// for single stream use dash segments
ngx_memzero(&header_extensions, sizeof(header_extensions));
rc = dash_packager_build_fragment_header(
&submodule_context->request_context,
&submodule_context->media_set,
submodule_context->request_params.segment_index,
0, // sample description index
&header_extensions,
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_hls_init_fmp4_frame_processor: dash_packager_build_fragment_header failed %i", rc);
return ngx_http_vod_status_to_ngx_error(submodule_context->r, rc);
}
}
// initialize the frame processor
if (!size_only || *response_size == 0)
{
rc = mp4_fragment_frame_writer_init(
&submodule_context->request_context,
submodule_context->media_set.sequences,
segment_writers[0].write_tail,
segment_writers[0].context,
reuse_input_buffers,
&state);
if (rc != VOD_OK)
{
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, submodule_context->request_context.log, 0,
"ngx_http_vod_hls_init_fmp4_frame_processor: mp4_fragment_frame_writer_init failed %i", rc);
return ngx_http_vod_status_to_ngx_error(submodule_context->r, rc);
}
*frame_processor = (ngx_http_vod_frame_processor_t)mp4_fragment_frame_writer_process;
*frame_processor_state = state;
}
}
#if (NGX_HAVE_OPENSSL_EVP)
if (encryption_params.type == HLS_ENC_AES_128)
{
*response_size = aes_round_up_to_block(*response_size);
}
#endif // NGX_HAVE_OPENSSL_EVP
// set the 'Content-type' header
mp4_fragment_get_content_type(
submodule_context->media_set.track_count[MEDIA_TYPE_VIDEO],
content_type);
return NGX_OK;
}
static ngx_int_t
ngx_http_vod_hls_handle_vtt_segment(
ngx_http_vod_submodule_context_t* submodule_context,
ngx_str_t* response,
ngx_str_t* content_type)
{
vod_status_t rc;
rc = webvtt_builder_build(
&submodule_context->request_context,
&submodule_context->media_set,
FALSE,
response);
if (rc != VOD_OK)
{
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, submodule_context->request_context.log, 0,
"ngx_http_vod_hls_handle_vtt_segment: webvtt_builder_build failed %i", rc);
return ngx_http_vod_status_to_ngx_error(submodule_context->r, rc);
}
content_type->len = sizeof(vtt_content_type) - 1;
content_type->data = (u_char *)vtt_content_type;
return NGX_OK;
}
static const ngx_http_vod_request_t hls_master_request = {
0,
PARSE_FLAG_DURATION_LIMITS_AND_TOTAL_SIZE | PARSE_FLAG_KEY_FRAME_BITRATE | PARSE_FLAG_CODEC_NAME | PARSE_FLAG_PARSED_EXTRA_DATA_SIZE | PARSE_FLAG_CODEC_TRANSFER_CHAR,
REQUEST_CLASS_OTHER,
SUPPORTED_CODECS | VOD_CODEC_FLAG(WEBVTT),
HLS_TIMESCALE,
ngx_http_vod_hls_handle_master_playlist,
NULL,
};
static const ngx_http_vod_request_t hls_index_request = {
REQUEST_FLAG_SINGLE_TRACK_PER_MEDIA_TYPE | REQUEST_FLAG_TIME_DEPENDENT_ON_LIVE,
PARSE_BASIC_METADATA_ONLY,
REQUEST_CLASS_MANIFEST,
SUPPORTED_CODECS | VOD_CODEC_FLAG(WEBVTT),
HLS_TIMESCALE,
ngx_http_vod_hls_handle_index_playlist,
NULL,
};
static const ngx_http_vod_request_t hls_iframes_request = {
REQUEST_FLAG_SINGLE_TRACK_PER_MEDIA_TYPE | REQUEST_FLAG_PARSE_ALL_CLIPS,
PARSE_FLAG_FRAMES_ALL_EXCEPT_OFFSETS | PARSE_FLAG_PARSED_EXTRA_DATA_SIZE,
REQUEST_CLASS_OTHER,
SUPPORTED_CODECS,
HLS_TIMESCALE,
ngx_http_vod_hls_handle_iframe_playlist,
NULL,
};
static const ngx_http_vod_request_t hls_enc_key_request = {
REQUEST_FLAG_SINGLE_TRACK_PER_MEDIA_TYPE,
PARSE_BASIC_METADATA_ONLY,
REQUEST_CLASS_OTHER,
SUPPORTED_CODECS,
HLS_TIMESCALE,
ngx_http_vod_hls_handle_encryption_key,
NULL,
};
static const ngx_http_vod_request_t hls_ts_segment_request = {
REQUEST_FLAG_SINGLE_TRACK_PER_MEDIA_TYPE,
PARSE_FLAG_FRAMES_ALL | PARSE_FLAG_PARSED_EXTRA_DATA | PARSE_FLAG_INITIAL_PTS_DELAY,
REQUEST_CLASS_SEGMENT,
SUPPORTED_CODECS,
HLS_TIMESCALE,
NULL,
ngx_http_vod_hls_init_ts_frame_processor,
};
static const ngx_http_vod_request_t hls_mp4_segment_request = {
REQUEST_FLAG_SINGLE_TRACK_PER_MEDIA_TYPE,
PARSE_FLAG_FRAMES_ALL | PARSE_FLAG_INITIAL_PTS_DELAY,
REQUEST_CLASS_SEGMENT,
SUPPORTED_CODECS,
HLS_TIMESCALE,
NULL,
ngx_http_vod_hls_init_fmp4_frame_processor,
};
static const ngx_http_vod_request_t hls_mp4_segment_request_cbcs = {
REQUEST_FLAG_SINGLE_TRACK_PER_MEDIA_TYPE,
PARSE_FLAG_FRAMES_ALL | PARSE_FLAG_EXTRA_DATA | PARSE_FLAG_INITIAL_PTS_DELAY,
REQUEST_CLASS_SEGMENT,
SUPPORTED_CODECS,
HLS_TIMESCALE,
NULL,
ngx_http_vod_hls_init_fmp4_frame_processor,
};
static const ngx_http_vod_request_t hls_mp4_segment_request_cenc = {
REQUEST_FLAG_SINGLE_TRACK_PER_MEDIA_TYPE,
PARSE_FLAG_FRAMES_ALL | PARSE_FLAG_PARSED_EXTRA_DATA | PARSE_FLAG_INITIAL_PTS_DELAY,
REQUEST_CLASS_SEGMENT,
SUPPORTED_CODECS,
HLS_TIMESCALE,
NULL,
ngx_http_vod_hls_init_fmp4_frame_processor,
};
static const ngx_http_vod_request_t hls_vtt_segment_request = {
REQUEST_FLAG_SINGLE_TRACK,
PARSE_FLAG_FRAMES_ALL | PARSE_FLAG_EXTRA_DATA,
REQUEST_CLASS_SEGMENT,
VOD_CODEC_FLAG(WEBVTT),
WEBVTT_TIMESCALE,
ngx_http_vod_hls_handle_vtt_segment,
NULL,
};
static const ngx_http_vod_request_t hls_mp4_init_request = {
REQUEST_FLAG_SINGLE_TRACK_PER_MEDIA_TYPE,
PARSE_BASIC_METADATA_ONLY | PARSE_FLAG_SAVE_RAW_ATOMS,
REQUEST_CLASS_OTHER,
SUPPORTED_CODECS,
HLS_TIMESCALE,
ngx_http_vod_hls_handle_mp4_init_segment,
NULL,
};
static void
ngx_http_vod_hls_create_loc_conf(
ngx_conf_t *cf,
ngx_http_vod_hls_loc_conf_t *conf)
{
conf->absolute_master_urls = NGX_CONF_UNSET;
conf->absolute_index_urls = NGX_CONF_UNSET;
conf->absolute_iframe_urls = NGX_CONF_UNSET;
conf->mpegts_muxer_config.interleave_frames = NGX_CONF_UNSET;
conf->mpegts_muxer_config.align_frames = NGX_CONF_UNSET;
conf->mpegts_muxer_config.output_id3_timestamps = NGX_CONF_UNSET;
conf->mpegts_muxer_config.align_pts = NGX_CONF_UNSET;
conf->encryption_method = NGX_CONF_UNSET_UINT;
conf->m3u8_config.output_iframes_playlist = NGX_CONF_UNSET;
conf->m3u8_config.force_unmuxed_segments = NGX_CONF_UNSET;
conf->m3u8_config.container_format = NGX_CONF_UNSET_UINT;
}
static char *
ngx_http_vod_hls_merge_loc_conf(
ngx_conf_t *cf,
ngx_http_vod_loc_conf_t *base,
ngx_http_vod_hls_loc_conf_t *conf,
ngx_http_vod_hls_loc_conf_t *prev)
{
ngx_conf_merge_value(conf->absolute_master_urls, prev->absolute_master_urls, 1);