mirror of
https://github.com/zotanmew/nginx-rtmp-module.git
synced 2024-04-28 18:53:45 +02:00
715 lines
20 KiB
C
715 lines
20 KiB
C
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/*
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* Copyright (C) Roman Arutyunyan
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*/
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#include <ngx_config.h>
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#include <ngx_core.h>
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#include "ngx_rtmp_codec_module.h"
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#include "ngx_rtmp_live_module.h"
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#include "ngx_rtmp_cmd_module.h"
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#define NGX_RTMP_CODEC_META_OFF 0
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#define NGX_RTMP_CODEC_META_ON 1
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#define NGX_RTMP_CODEC_META_COPY 2
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static void * ngx_rtmp_codec_create_app_conf(ngx_conf_t *cf);
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static char * ngx_rtmp_codec_merge_app_conf(ngx_conf_t *cf,
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void *parent, void *child);
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static ngx_int_t ngx_rtmp_codec_postconfiguration(ngx_conf_t *cf);
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static ngx_int_t ngx_rtmp_codec_reconstruct_meta(ngx_rtmp_session_t *s);
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static ngx_int_t ngx_rtmp_codec_copy_meta(ngx_rtmp_session_t *s,
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ngx_rtmp_header_t *h, ngx_chain_t *in);
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static ngx_int_t ngx_rtmp_codec_prepare_meta(ngx_rtmp_session_t *s,
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uint32_t timestamp);
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typedef struct {
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ngx_uint_t meta;
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} ngx_rtmp_codec_app_conf_t;
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static ngx_conf_enum_t ngx_rtmp_codec_meta_slots[] = {
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{ ngx_string("off"), NGX_RTMP_CODEC_META_OFF },
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{ ngx_string("on"), NGX_RTMP_CODEC_META_ON },
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{ ngx_string("copy"), NGX_RTMP_CODEC_META_COPY },
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{ ngx_null_string, 0 }
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};
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static ngx_command_t ngx_rtmp_codec_commands[] = {
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{ ngx_string("meta"),
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NGX_RTMP_MAIN_CONF|NGX_RTMP_SRV_CONF|NGX_RTMP_APP_CONF|NGX_CONF_TAKE1,
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ngx_conf_set_enum_slot,
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NGX_RTMP_APP_CONF_OFFSET,
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offsetof(ngx_rtmp_codec_app_conf_t, meta),
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&ngx_rtmp_codec_meta_slots },
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ngx_null_command
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};
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static ngx_rtmp_module_t ngx_rtmp_codec_module_ctx = {
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NULL, /* preconfiguration */
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ngx_rtmp_codec_postconfiguration, /* postconfiguration */
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NULL, /* create main configuration */
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NULL, /* init main configuration */
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NULL, /* create server configuration */
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NULL, /* merge server configuration */
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ngx_rtmp_codec_create_app_conf, /* create app configuration */
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ngx_rtmp_codec_merge_app_conf /* merge app configuration */
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};
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ngx_module_t ngx_rtmp_codec_module = {
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NGX_MODULE_V1,
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&ngx_rtmp_codec_module_ctx, /* module context */
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ngx_rtmp_codec_commands, /* module directives */
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NGX_RTMP_MODULE, /* module type */
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NULL, /* init master */
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NULL, /* init module */
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NULL, /* init process */
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NULL, /* init thread */
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NULL, /* exit thread */
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NULL, /* exit process */
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NULL, /* exit master */
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NGX_MODULE_V1_PADDING
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};
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static const char *
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audio_codecs[] = {
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"",
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"ADPCM",
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"MP3",
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"LinearLE",
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"Nellymoser16",
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"Nellymoser8",
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"Nellymoser",
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"G711A",
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"G711U",
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"",
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"AAC",
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"Speex",
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"",
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"",
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"MP3-8K",
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"DeviceSpecific",
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"Uncompressed"
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};
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static const char *
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video_codecs[] = {
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"",
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"Jpeg",
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"Sorenson-H263",
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"ScreenVideo",
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"On2-VP6",
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"On2-VP6-Alpha",
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"ScreenVideo2",
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"H264",
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};
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u_char *
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ngx_rtmp_get_audio_codec_name(ngx_uint_t id)
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{
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return (u_char *)(id < sizeof(audio_codecs) / sizeof(audio_codecs[0])
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? audio_codecs[id]
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: "");
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}
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u_char *
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ngx_rtmp_get_video_codec_name(ngx_uint_t id)
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{
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return (u_char *)(id < sizeof(video_codecs) / sizeof(video_codecs[0])
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? video_codecs[id]
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: "");
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}
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static ngx_uint_t
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ngx_rtmp_codec_get_next_version()
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{
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ngx_uint_t v;
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static ngx_uint_t version;
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do {
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v = ++version;
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} while (v == 0);
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return v;
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}
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static ngx_int_t
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ngx_rtmp_codec_disconnect(ngx_rtmp_session_t *s, ngx_rtmp_header_t *h,
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ngx_chain_t *in)
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{
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ngx_rtmp_codec_ctx_t *ctx;
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ngx_rtmp_core_srv_conf_t *cscf;
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ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_codec_module);
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if (ctx == NULL) {
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return NGX_OK;
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}
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cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
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if (ctx->avc_header) {
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ngx_rtmp_free_shared_chain(cscf, ctx->avc_header);
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ctx->avc_header = NULL;
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}
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if (ctx->aac_header) {
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ngx_rtmp_free_shared_chain(cscf, ctx->aac_header);
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ctx->aac_header = NULL;
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}
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if (ctx->meta) {
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ngx_rtmp_free_shared_chain(cscf, ctx->meta);
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ctx->meta = NULL;
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}
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return NGX_OK;
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}
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static ngx_int_t
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ngx_rtmp_codec_av(ngx_rtmp_session_t *s, ngx_rtmp_header_t *h,
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ngx_chain_t *in)
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{
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ngx_rtmp_core_srv_conf_t *cscf;
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ngx_rtmp_codec_ctx_t *ctx;
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ngx_chain_t **header;
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uint8_t fmt;
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ngx_uint_t idx;
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u_char *p;
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static ngx_uint_t sample_rates[] =
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{ 5512, 11025, 22050, 44100 };
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static ngx_uint_t aac_sample_rates[] =
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{ 96000, 88200, 64000, 48000,
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44100, 32000, 24000, 22050,
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16000, 12000, 11025, 8000,
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7350, 0, 0, 0 };
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if (h->type != NGX_RTMP_MSG_AUDIO && h->type != NGX_RTMP_MSG_VIDEO) {
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return NGX_OK;
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}
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ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_codec_module);
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if (ctx == NULL) {
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ctx = ngx_pcalloc(s->connection->pool, sizeof(ngx_rtmp_codec_ctx_t));
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ngx_rtmp_set_ctx(s, ctx, ngx_rtmp_codec_module);
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}
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/* save codec */
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if (in->buf->last - in->buf->pos < 1) {
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return NGX_OK;
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}
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fmt = in->buf->pos[0];
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if (h->type == NGX_RTMP_MSG_AUDIO) {
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ctx->audio_codec_id = (fmt & 0xf0) >> 4;
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ctx->audio_channels = (fmt & 0x01) + 1;
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ctx->sample_size = (fmt & 0x02) ? 2 : 1;
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if (ctx->aac_sample_rate == 0) {
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ctx->sample_rate = sample_rates[(fmt & 0x0c) >> 2];
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}
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} else {
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ctx->video_codec_id = (fmt & 0x0f);
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}
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/* save AVC/AAC header */
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if (in->buf->last - in->buf->pos < 3) {
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return NGX_OK;
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}
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/* no conf */
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if (!ngx_rtmp_is_codec_header(in)) {
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return NGX_OK;
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}
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cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
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header = NULL;
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if (h->type == NGX_RTMP_MSG_AUDIO) {
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if (ctx->audio_codec_id == NGX_RTMP_AUDIO_AAC) {
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header = &ctx->aac_header;
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if (in->buf->last - in->buf->pos > 3) {
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p = in->buf->pos + 2;
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/* MPEG-4 Audio Specific Config
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5 bits: object type
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if (object type == 31)
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6 bits + 32: object type
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--->4 bits: frequency index
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if (frequency index == 15)
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24 bits: frequency
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4 bits: channel configuration
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var bits: AOT Specific Config
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*/
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if ((p[0] >> 3) == 0x1f) {
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idx = (p[1] >> 1) & 0x0f;
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} else {
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idx = ((p[0] << 1) & 0x0f) | (p[1] >> 7);
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}
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#ifdef NGX_DEBUG
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{
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u_char buf[256], *p, *pp;
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u_char hex[] = "01234567890abcdef";
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for (pp = buf, p = in->buf->pos;
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p < in->buf->last && pp < buf + sizeof(buf) - 1;
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++p)
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{
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*pp++ = hex[*p >> 4];
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*pp++ = hex[*p & 0x0f];
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}
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*pp = 0;
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ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
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"codec: AAC header: %s", buf);
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}
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#endif
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ctx->aac_sample_rate = aac_sample_rates[idx];
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ctx->sample_rate = ctx->aac_sample_rate;
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}
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ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
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"codec: AAC header arrived, sample_rate=%ui",
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ctx->aac_sample_rate);
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}
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} else {
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if (ctx->video_codec_id == NGX_RTMP_VIDEO_H264) {
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header = &ctx->avc_header;
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ngx_log_debug0(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
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"codec: AVC/H264 header arrived");
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}
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}
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if (header == NULL) {
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return NGX_OK;
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}
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if (*header) {
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ngx_rtmp_free_shared_chain(cscf, *header);
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}
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*header = ngx_rtmp_append_shared_bufs(cscf, NULL, in);
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return NGX_OK;
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}
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static ngx_int_t
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ngx_rtmp_codec_reconstruct_meta(ngx_rtmp_session_t *s)
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{
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ngx_rtmp_codec_ctx_t *ctx;
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ngx_rtmp_core_srv_conf_t *cscf;
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ngx_int_t rc;
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static struct {
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double width;
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double height;
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double duration;
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double frame_rate;
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double video_data_rate;
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double video_codec_id;
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double audio_data_rate;
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double audio_codec_id;
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u_char profile[32];
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u_char level[32];
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} v;
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static ngx_rtmp_amf_elt_t out_inf[] = {
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{ NGX_RTMP_AMF_STRING,
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ngx_string("Server"),
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"NGINX RTMP (github.com/arut/nginx-rtmp-module)", 0 },
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{ NGX_RTMP_AMF_NUMBER,
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ngx_string("width"),
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&v.width, 0 },
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{ NGX_RTMP_AMF_NUMBER,
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ngx_string("height"),
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&v.height, 0 },
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{ NGX_RTMP_AMF_NUMBER,
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ngx_string("displayWidth"),
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&v.width, 0 },
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{ NGX_RTMP_AMF_NUMBER,
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ngx_string("displayHeight"),
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&v.height, 0 },
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{ NGX_RTMP_AMF_NUMBER,
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ngx_string("duration"),
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&v.duration, 0 },
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{ NGX_RTMP_AMF_NUMBER,
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ngx_string("framerate"),
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&v.frame_rate, 0 },
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{ NGX_RTMP_AMF_NUMBER,
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ngx_string("fps"),
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&v.frame_rate, 0 },
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{ NGX_RTMP_AMF_NUMBER,
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ngx_string("videodatarate"),
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&v.video_data_rate, 0 },
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{ NGX_RTMP_AMF_NUMBER,
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ngx_string("videocodecid"),
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&v.video_codec_id, 0 },
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{ NGX_RTMP_AMF_NUMBER,
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ngx_string("audiodatarate"),
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&v.audio_data_rate, 0 },
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{ NGX_RTMP_AMF_NUMBER,
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ngx_string("audiocodecid"),
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&v.audio_codec_id, 0 },
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{ NGX_RTMP_AMF_STRING,
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ngx_string("profile"),
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&v.profile, sizeof(v.profile) },
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{ NGX_RTMP_AMF_STRING,
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ngx_string("level"),
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&v.level, sizeof(v.level) },
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};
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static ngx_rtmp_amf_elt_t out_elts[] = {
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{ NGX_RTMP_AMF_STRING,
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ngx_null_string,
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"onMetaData", 0 },
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{ NGX_RTMP_AMF_OBJECT,
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ngx_null_string,
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out_inf, sizeof(out_inf) },
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};
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ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_codec_module);
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if (ctx == NULL) {
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return NGX_OK;
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}
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cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
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if (ctx->meta) {
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ngx_rtmp_free_shared_chain(cscf, ctx->meta);
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ctx->meta = NULL;
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}
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v.width = ctx->width;
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v.height = ctx->height;
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v.duration = ctx->duration;
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v.frame_rate = ctx->frame_rate;
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v.video_data_rate = ctx->video_data_rate;
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v.video_codec_id = ctx->video_codec_id;
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v.audio_data_rate = ctx->audio_data_rate;
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v.audio_codec_id = ctx->audio_codec_id;
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ngx_memcpy(v.profile, ctx->profile, sizeof(ctx->profile));
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ngx_memcpy(v.level, ctx->level, sizeof(ctx->level));
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rc = ngx_rtmp_append_amf(s, &ctx->meta, NULL, out_elts,
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sizeof(out_elts) / sizeof(out_elts[0]));
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if (rc != NGX_OK || ctx->meta == NULL) {
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return NGX_ERROR;
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}
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return ngx_rtmp_codec_prepare_meta(s, 0);
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}
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static ngx_int_t
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ngx_rtmp_codec_copy_meta(ngx_rtmp_session_t *s, ngx_rtmp_header_t *h,
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ngx_chain_t *in)
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{
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ngx_rtmp_codec_ctx_t *ctx;
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ngx_rtmp_core_srv_conf_t *cscf;
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ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_codec_module);
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cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
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if (ctx->meta) {
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ngx_rtmp_free_shared_chain(cscf, ctx->meta);
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}
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ctx->meta = ngx_rtmp_append_shared_bufs(cscf, NULL, in);
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if (ctx->meta == NULL) {
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return NGX_ERROR;
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}
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return ngx_rtmp_codec_prepare_meta(s, h->timestamp);
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}
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static ngx_int_t
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ngx_rtmp_codec_prepare_meta(ngx_rtmp_session_t *s, uint32_t timestamp)
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{
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ngx_rtmp_header_t h;
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ngx_rtmp_codec_ctx_t *ctx;
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ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_codec_module);
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ngx_memzero(&h, sizeof(h));
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h.csid = NGX_RTMP_CSID_AMF;
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h.msid = NGX_RTMP_MSID;
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h.type = NGX_RTMP_MSG_AMF_META;
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h.timestamp = timestamp;
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ngx_rtmp_prepare_message(s, &h, NULL, ctx->meta);
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ctx->meta_version = ngx_rtmp_codec_get_next_version();
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return NGX_OK;
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}
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static ngx_int_t
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ngx_rtmp_codec_meta_data(ngx_rtmp_session_t *s, ngx_rtmp_header_t *h,
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ngx_chain_t *in)
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{
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ngx_rtmp_codec_app_conf_t *cacf;
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ngx_rtmp_codec_ctx_t *ctx;
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ngx_uint_t skip;
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static struct {
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double width;
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double height;
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double duration;
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double frame_rate;
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double video_data_rate;
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double video_codec_id_n;
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u_char video_codec_id_s[32];
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double audio_data_rate;
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double audio_codec_id_n;
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u_char audio_codec_id_s[32];
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u_char profile[32];
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u_char level[32];
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} v;
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static ngx_rtmp_amf_elt_t in_video_codec_id[] = {
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{ NGX_RTMP_AMF_NUMBER,
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ngx_null_string,
|
|
&v.video_codec_id_n, 0 },
|
|
|
|
{ NGX_RTMP_AMF_STRING,
|
|
ngx_null_string,
|
|
&v.video_codec_id_s, sizeof(v.video_codec_id_s) },
|
|
};
|
|
|
|
static ngx_rtmp_amf_elt_t in_audio_codec_id[] = {
|
|
|
|
{ NGX_RTMP_AMF_NUMBER,
|
|
ngx_null_string,
|
|
&v.audio_codec_id_n, 0 },
|
|
|
|
{ NGX_RTMP_AMF_STRING,
|
|
ngx_null_string,
|
|
&v.audio_codec_id_s, sizeof(v.audio_codec_id_s) },
|
|
};
|
|
|
|
static ngx_rtmp_amf_elt_t in_inf[] = {
|
|
|
|
{ NGX_RTMP_AMF_NUMBER,
|
|
ngx_string("width"),
|
|
&v.width, 0 },
|
|
|
|
{ NGX_RTMP_AMF_NUMBER,
|
|
ngx_string("height"),
|
|
&v.height, 0 },
|
|
|
|
{ NGX_RTMP_AMF_NUMBER,
|
|
ngx_string("duration"),
|
|
&v.duration, 0 },
|
|
|
|
{ NGX_RTMP_AMF_NUMBER,
|
|
ngx_string("framerate"),
|
|
&v.frame_rate, 0 },
|
|
|
|
{ NGX_RTMP_AMF_NUMBER,
|
|
ngx_string("fps"),
|
|
&v.frame_rate, 0 },
|
|
|
|
{ NGX_RTMP_AMF_NUMBER,
|
|
ngx_string("videodatarate"),
|
|
&v.video_data_rate, 0 },
|
|
|
|
{ NGX_RTMP_AMF_VARIANT,
|
|
ngx_string("videocodecid"),
|
|
in_video_codec_id, sizeof(in_video_codec_id) },
|
|
|
|
{ NGX_RTMP_AMF_NUMBER,
|
|
ngx_string("audiodatarate"),
|
|
&v.audio_data_rate, 0 },
|
|
|
|
{ NGX_RTMP_AMF_VARIANT,
|
|
ngx_string("audiocodecid"),
|
|
in_audio_codec_id, sizeof(in_audio_codec_id) },
|
|
|
|
{ NGX_RTMP_AMF_STRING,
|
|
ngx_string("profile"),
|
|
&v.profile, sizeof(v.profile) },
|
|
|
|
{ NGX_RTMP_AMF_STRING,
|
|
ngx_string("level"),
|
|
&v.level, sizeof(v.level) },
|
|
};
|
|
|
|
static ngx_rtmp_amf_elt_t in_elts[] = {
|
|
|
|
{ NGX_RTMP_AMF_STRING,
|
|
ngx_null_string,
|
|
NULL, 0 },
|
|
|
|
{ NGX_RTMP_AMF_OBJECT,
|
|
ngx_null_string,
|
|
in_inf, sizeof(in_inf) },
|
|
};
|
|
|
|
cacf = ngx_rtmp_get_module_app_conf(s, ngx_rtmp_codec_module);
|
|
|
|
ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_codec_module);
|
|
if (ctx == NULL) {
|
|
ctx = ngx_pcalloc(s->connection->pool, sizeof(ngx_rtmp_codec_ctx_t));
|
|
ngx_rtmp_set_ctx(s, ctx, ngx_rtmp_codec_module);
|
|
}
|
|
|
|
ngx_memzero(&v, sizeof(v));
|
|
|
|
/* use -1 as a sign of unchanged data;
|
|
* 0 is a valid value for uncompressed audio */
|
|
v.audio_codec_id_n = -1;
|
|
|
|
/* FFmpeg sends a string in front of actal metadata; ignore it */
|
|
skip = !(in->buf->last > in->buf->pos
|
|
&& *in->buf->pos == NGX_RTMP_AMF_STRING);
|
|
if (ngx_rtmp_receive_amf(s, in, in_elts + skip,
|
|
sizeof(in_elts) / sizeof(in_elts[0]) - skip))
|
|
{
|
|
ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
|
|
"codec: error parsing data frame");
|
|
return NGX_OK;
|
|
}
|
|
|
|
ctx->width = (ngx_uint_t) v.width;
|
|
ctx->height = (ngx_uint_t) v.height;
|
|
ctx->duration = (ngx_uint_t) v.duration;
|
|
ctx->frame_rate = (ngx_uint_t) v.frame_rate;
|
|
ctx->video_data_rate = (ngx_uint_t) v.video_data_rate;
|
|
ctx->video_codec_id = (ngx_uint_t) v.video_codec_id_n;
|
|
ctx->audio_data_rate = (ngx_uint_t) v.audio_data_rate;
|
|
ctx->audio_codec_id = (v.audio_codec_id_n == -1
|
|
? 0 : v.audio_codec_id_n == 0
|
|
? NGX_RTMP_AUDIO_UNCOMPRESSED : (ngx_uint_t) v.audio_codec_id_n);
|
|
ngx_memcpy(ctx->profile, v.profile, sizeof(v.profile));
|
|
ngx_memcpy(ctx->level, v.level, sizeof(v.level));
|
|
|
|
ngx_log_debug8(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
|
|
"codec: data frame: "
|
|
"width=%ui height=%ui duration=%ui frame_rate=%ui "
|
|
"video=%s (%ui) audio=%s (%ui)",
|
|
ctx->width, ctx->height, ctx->duration, ctx->frame_rate,
|
|
ngx_rtmp_get_video_codec_name(ctx->video_codec_id),
|
|
ctx->video_codec_id,
|
|
ngx_rtmp_get_audio_codec_name(ctx->audio_codec_id),
|
|
ctx->audio_codec_id);
|
|
|
|
switch (cacf->meta) {
|
|
case NGX_RTMP_CODEC_META_ON:
|
|
return ngx_rtmp_codec_reconstruct_meta(s);
|
|
case NGX_RTMP_CODEC_META_COPY:
|
|
return ngx_rtmp_codec_copy_meta(s, h, in);
|
|
}
|
|
|
|
/* NGX_RTMP_CODEC_META_OFF */
|
|
|
|
return NGX_OK;
|
|
}
|
|
|
|
|
|
static void *
|
|
ngx_rtmp_codec_create_app_conf(ngx_conf_t *cf)
|
|
{
|
|
ngx_rtmp_codec_app_conf_t *cacf;
|
|
|
|
cacf = ngx_pcalloc(cf->pool, sizeof(ngx_rtmp_codec_app_conf_t));
|
|
if (cacf == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
cacf->meta = NGX_CONF_UNSET_UINT;
|
|
|
|
return cacf;
|
|
}
|
|
|
|
|
|
static char *
|
|
ngx_rtmp_codec_merge_app_conf(ngx_conf_t *cf, void *parent, void *child)
|
|
{
|
|
ngx_rtmp_codec_app_conf_t *prev = parent;
|
|
ngx_rtmp_codec_app_conf_t *conf = child;
|
|
|
|
ngx_conf_merge_uint_value(conf->meta, prev->meta, NGX_RTMP_CODEC_META_ON);
|
|
|
|
return NGX_CONF_OK;
|
|
}
|
|
|
|
|
|
static ngx_int_t
|
|
ngx_rtmp_codec_postconfiguration(ngx_conf_t *cf)
|
|
{
|
|
ngx_rtmp_core_main_conf_t *cmcf;
|
|
ngx_rtmp_handler_pt *h;
|
|
ngx_rtmp_amf_handler_t *ch;
|
|
|
|
cmcf = ngx_rtmp_conf_get_module_main_conf(cf, ngx_rtmp_core_module);
|
|
|
|
h = ngx_array_push(&cmcf->events[NGX_RTMP_MSG_AUDIO]);
|
|
*h = ngx_rtmp_codec_av;
|
|
|
|
h = ngx_array_push(&cmcf->events[NGX_RTMP_MSG_VIDEO]);
|
|
*h = ngx_rtmp_codec_av;
|
|
|
|
h = ngx_array_push(&cmcf->events[NGX_RTMP_DISCONNECT]);
|
|
*h = ngx_rtmp_codec_disconnect;
|
|
|
|
/* register metadata handler */
|
|
ch = ngx_array_push(&cmcf->amf);
|
|
if (ch == NULL) {
|
|
return NGX_ERROR;
|
|
}
|
|
ngx_str_set(&ch->name, "@setDataFrame");
|
|
ch->handler = ngx_rtmp_codec_meta_data;
|
|
|
|
ch = ngx_array_push(&cmcf->amf);
|
|
if (ch == NULL) {
|
|
return NGX_ERROR;
|
|
}
|
|
ngx_str_set(&ch->name, "onMetaData");
|
|
ch->handler = ngx_rtmp_codec_meta_data;
|
|
|
|
|
|
return NGX_OK;
|
|
}
|