libavformat/icecast.c - nest-android-app/ffmpeg - Git at Google

 /*
  * Icecast protocol for FFmpeg
  * Copyright (c) 2014 Marvin Scholz
  *
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */


 #include "libavutil/avstring.h"
 #include "libavutil/bprint.h"
 #include "libavutil/opt.h"

 #include "avformat.h"
 #include "network.h"


 typedef struct IcecastContext {
     const AVClass *class;
     URLContext *hd;
     int send_started;
     char *user;
     // Options
     char *content_type;
     char *description;
     char *genre;
     int legacy_icecast;
     char *name;
     char *pass;
     int public;
     char *url;
     char *user_agent;
 } IcecastContext;

 #define DEFAULT_ICE_USER "source"

 #define NOT_EMPTY(s) (s && s[0])

 #define OFFSET(x) offsetof(IcecastContext, x)
 #define E AV_OPT_FLAG_ENCODING_PARAM

 static const AVOption options[] = {
     { "ice_genre", "set stream genre", OFFSET(genre), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
     { "ice_name", "set stream description", OFFSET(name), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
     { "ice_description", "set stream description", OFFSET(description), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
     { "ice_url", "set stream website", OFFSET(url), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
     { "ice_public", "set if stream is public", OFFSET(public), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
     { "user_agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
     { "password", "set password", OFFSET(pass), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
     { "content_type", "set content-type, MUST be set if not audio/mpeg", OFFSET(content_type), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
     { "legacy_icecast", "use legacy SOURCE method, for Icecast < v2.4", OFFSET(legacy_icecast), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
     { NULL }
 };


 static void cat_header(AVBPrint *bp, const char key[], const char value[])
 {
     if (NOT_EMPTY(value))
         av_bprintf(bp, "%s: %s\r\n", key, value);
 }

 static int icecast_close(URLContext *h)
 {
     IcecastContext *s = h->priv_data;
     if (s->hd)
         ffurl_close(s->hd);
     return 0;
 }

 static int icecast_open(URLContext *h, const char *uri, int flags)
 {
     IcecastContext *s = h->priv_data;

     // Dict to set options that we pass to the HTTP protocol
     AVDictionary *opt_dict = NULL;

     // URI part variables
     char h_url[1024], host[1024], auth[1024], path[1024];
     char *headers = NULL, *user = NULL;
     int port, ret;
     AVBPrint bp;

     if (flags & AVIO_FLAG_READ)
         return AVERROR(ENOSYS);

     av_bprint_init(&bp, 0, 1);

     // Build header strings
     cat_header(&bp, "Ice-Name", s->name);
     cat_header(&bp, "Ice-Description", s->description);
     cat_header(&bp, "Ice-URL", s->url);
     cat_header(&bp, "Ice-Genre", s->genre);
     cat_header(&bp, "Ice-Public", s->public ? "1" : "0");
     if (!av_bprint_is_complete(&bp)) {
         ret = AVERROR(ENOMEM);
         goto cleanup;
     }
     av_bprint_finalize(&bp, &headers);

     // Set options
     av_dict_set(&opt_dict, "method", s->legacy_icecast ? "SOURCE" : "PUT", 0);
     av_dict_set(&opt_dict, "auth_type", "basic", 0);
     av_dict_set(&opt_dict, "headers", headers, 0);
     av_dict_set(&opt_dict, "chunked_post", "0", 0);
     av_dict_set(&opt_dict, "send_expect_100", s->legacy_icecast ? "0" : "1", 0);
     if (NOT_EMPTY(s->content_type))
         av_dict_set(&opt_dict, "content_type", s->content_type, 0);
     else
         av_dict_set(&opt_dict, "content_type", "audio/mpeg", 0);
     if (NOT_EMPTY(s->user_agent))
         av_dict_set(&opt_dict, "user_agent", s->user_agent, 0);

     // Parse URI
     av_url_split(NULL, 0, auth, sizeof(auth), host, sizeof(host),
                  &port, path, sizeof(path), uri);

     // Check for auth data in URI
     if (auth[0]) {
         char *sep = strchr(auth, ':');
         if (sep) {
             *sep = 0;
             sep++;
             if (s->pass) {
                 av_free(s->pass);
                 av_log(h, AV_LOG_WARNING, "Overwriting -password <pass> with URI password!\n");
             }
             if (!(s->pass = av_strdup(sep))) {
                 ret = AVERROR(ENOMEM);
                 goto cleanup;
             }
         }
         if (!(user = av_strdup(auth))) {
             ret = AVERROR(ENOMEM);
             goto cleanup;
         }
     }

     // Build new authstring
     snprintf(auth, sizeof(auth),
              "%s:%s",
              user ? user : DEFAULT_ICE_USER,
              s->pass ? s->pass : "");

     // Check for mountpoint (path)
     if (!path[0] || strcmp(path, "/") == 0) {
         av_log(h, AV_LOG_ERROR, "No mountpoint (path) specified!\n");
         ret = AVERROR(EIO);
         goto cleanup;
     }

     // Build new URI for passing to http protocol
     ff_url_join(h_url, sizeof(h_url), "http", auth, host, port, "%s", path);
     // Finally open http proto handler
     ret = ffurl_open_whitelist(&s->hd, h_url, AVIO_FLAG_READ_WRITE, NULL,
                                &opt_dict, h->protocol_whitelist);

 cleanup:
     av_freep(&user);
     av_freep(&headers);
     av_dict_free(&opt_dict);

     return ret;
 }

 static int icecast_write(URLContext *h, const uint8_t *buf, int size)
 {
     IcecastContext *s = h->priv_data;
     if (!s->send_started) {
         s->send_started = 1;
         if (!s->content_type && size >= 8) {
             static const uint8_t oggs[4] = { 0x4F, 0x67, 0x67, 0x53 };
             static const uint8_t webm[4] = { 0x1A, 0x45, 0xDF, 0xA3 };
             static const uint8_t opus[8] = { 0x4F, 0x70, 0x75, 0x73, 0x48, 0x65, 0x61, 0x64 };
             if (memcmp(buf, oggs, sizeof(oggs)) == 0) {
                 av_log(h, AV_LOG_WARNING, "Streaming Ogg but appropriate content type NOT set!\n");
                 av_log(h, AV_LOG_WARNING, "Set it with -content_type application/ogg\n");
             } else if (memcmp(buf, opus, sizeof(opus)) == 0) {
                 av_log(h, AV_LOG_WARNING, "Streaming Opus but appropriate content type NOT set!\n");
                 av_log(h, AV_LOG_WARNING, "Set it with -content_type audio/ogg\n");
             } else if (memcmp(buf, webm, sizeof(webm)) == 0) {
                 av_log(h, AV_LOG_WARNING, "Streaming WebM but appropriate content type NOT set!\n");
                 av_log(h, AV_LOG_WARNING, "Set it with -content_type video/webm\n");
             } else {
                 av_log(h, AV_LOG_WARNING, "It seems you are streaming an unsupported format.\n");
                 av_log(h, AV_LOG_WARNING, "It might work, but is not officially supported in Icecast!\n");
             }
         }
     }
     return ffurl_write(s->hd, buf, size);
 }

 static const AVClass icecast_context_class = {
     .class_name     = "icecast",
     .item_name      = av_default_item_name,
     .option         = options,
     .version        = LIBAVUTIL_VERSION_INT,
 };

 URLProtocol ff_icecast_protocol = {
     .name            = "icecast",
     .url_open        = icecast_open,
     .url_write       = icecast_write,
     .url_close       = icecast_close,
     .priv_data_size  = sizeof(IcecastContext),
     .priv_data_class = &icecast_context_class,
     .flags           = URL_PROTOCOL_FLAG_NETWORK,
 };
	/*
	* Icecast protocol for FFmpeg
	* Copyright (c) 2014 Marvin Scholz
	*
	* This file is part of FFmpeg.
	*
	* FFmpeg is free software; you can redistribute it and/or
	* modify it under the terms of the GNU Lesser General Public
	* License as published by the Free Software Foundation; either
	* version 2.1 of the License, or (at your option) any later version.
	*
	* FFmpeg is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* Lesser General Public License for more details.
	*
	* You should have received a copy of the GNU Lesser General Public
	* License along with FFmpeg; if not, write to the Free Software
	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	*/


	#include "libavutil/avstring.h"
	#include "libavutil/bprint.h"
	#include "libavutil/opt.h"

	#include "avformat.h"
	#include "network.h"


	typedef struct IcecastContext {
	const AVClass *class;
	URLContext *hd;
	int send_started;
	char *user;
	// Options
	char *content_type;
	char *description;
	char *genre;
	int legacy_icecast;
	char *name;
	char *pass;
	int public;
	char *url;
	char *user_agent;
	} IcecastContext;

	#define DEFAULT_ICE_USER "source"

	#define NOT_EMPTY(s) (s && s[0])

	#define OFFSET(x) offsetof(IcecastContext, x)
	#define E AV_OPT_FLAG_ENCODING_PARAM

	static const AVOption options[] = {
	{ "ice_genre", "set stream genre", OFFSET(genre), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
	{ "ice_name", "set stream description", OFFSET(name), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
	{ "ice_description", "set stream description", OFFSET(description), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
	{ "ice_url", "set stream website", OFFSET(url), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
	{ "ice_public", "set if stream is public", OFFSET(public), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
	{ "user_agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
	{ "password", "set password", OFFSET(pass), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
	{ "content_type", "set content-type, MUST be set if not audio/mpeg", OFFSET(content_type), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
	{ "legacy_icecast", "use legacy SOURCE method, for Icecast < v2.4", OFFSET(legacy_icecast), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
	{ NULL }
	};


	static void cat_header(AVBPrint *bp, const char key[], const char value[])
	{
	if (NOT_EMPTY(value))
	av_bprintf(bp, "%s: %s\r\n", key, value);
	}

	static int icecast_close(URLContext *h)
	{
	IcecastContext *s = h->priv_data;
	if (s->hd)
	ffurl_close(s->hd);
	return 0;
	}

	static int icecast_open(URLContext h, const char uri, int flags)
	{
	IcecastContext *s = h->priv_data;

	// Dict to set options that we pass to the HTTP protocol
	AVDictionary *opt_dict = NULL;

	// URI part variables
	char h_url[1024], host[1024], auth[1024], path[1024];
	char headers = NULL, user = NULL;
	int port, ret;
	AVBPrint bp;

	if (flags & AVIO_FLAG_READ)
	return AVERROR(ENOSYS);

	av_bprint_init(&bp, 0, 1);

	// Build header strings
	cat_header(&bp, "Ice-Name", s->name);
	cat_header(&bp, "Ice-Description", s->description);
	cat_header(&bp, "Ice-URL", s->url);
	cat_header(&bp, "Ice-Genre", s->genre);
	cat_header(&bp, "Ice-Public", s->public ? "1" : "0");
	if (!av_bprint_is_complete(&bp)) {
	ret = AVERROR(ENOMEM);
	goto cleanup;
	}
	av_bprint_finalize(&bp, &headers);

	// Set options
	av_dict_set(&opt_dict, "method", s->legacy_icecast ? "SOURCE" : "PUT", 0);
	av_dict_set(&opt_dict, "auth_type", "basic", 0);
	av_dict_set(&opt_dict, "headers", headers, 0);
	av_dict_set(&opt_dict, "chunked_post", "0", 0);
	av_dict_set(&opt_dict, "send_expect_100", s->legacy_icecast ? "0" : "1", 0);
	if (NOT_EMPTY(s->content_type))
	av_dict_set(&opt_dict, "content_type", s->content_type, 0);
	else
	av_dict_set(&opt_dict, "content_type", "audio/mpeg", 0);
	if (NOT_EMPTY(s->user_agent))
	av_dict_set(&opt_dict, "user_agent", s->user_agent, 0);

	// Parse URI
	av_url_split(NULL, 0, auth, sizeof(auth), host, sizeof(host),
	&port, path, sizeof(path), uri);

	// Check for auth data in URI
	if (auth[0]) {
	char *sep = strchr(auth, ':');
	if (sep) {
	*sep = 0;
	sep++;
	if (s->pass) {
	av_free(s->pass);
	av_log(h, AV_LOG_WARNING, "Overwriting -password <pass> with URI password!\n");
	}
	if (!(s->pass = av_strdup(sep))) {
	ret = AVERROR(ENOMEM);
	goto cleanup;
	}
	}
	if (!(user = av_strdup(auth))) {
	ret = AVERROR(ENOMEM);
	goto cleanup;
	}
	}

	// Build new authstring
	snprintf(auth, sizeof(auth),
	"%s:%s",
	user ? user : DEFAULT_ICE_USER,
	s->pass ? s->pass : "");

	// Check for mountpoint (path)
	if (!path[0] \|\| strcmp(path, "/") == 0) {
	av_log(h, AV_LOG_ERROR, "No mountpoint (path) specified!\n");
	ret = AVERROR(EIO);
	goto cleanup;
	}

	// Build new URI for passing to http protocol
	ff_url_join(h_url, sizeof(h_url), "http", auth, host, port, "%s", path);
	// Finally open http proto handler
	ret = ffurl_open_whitelist(&s->hd, h_url, AVIO_FLAG_READ_WRITE, NULL,
	&opt_dict, h->protocol_whitelist);

	cleanup:
	av_freep(&user);
	av_freep(&headers);
	av_dict_free(&opt_dict);

	return ret;
	}

	static int icecast_write(URLContext h, const uint8_t buf, int size)
	{
	IcecastContext *s = h->priv_data;
	if (!s->send_started) {
	s->send_started = 1;
	if (!s->content_type && size >= 8) {
	static const uint8_t oggs[4] = { 0x4F, 0x67, 0x67, 0x53 };
	static const uint8_t webm[4] = { 0x1A, 0x45, 0xDF, 0xA3 };
	static const uint8_t opus[8] = { 0x4F, 0x70, 0x75, 0x73, 0x48, 0x65, 0x61, 0x64 };
	if (memcmp(buf, oggs, sizeof(oggs)) == 0) {
	av_log(h, AV_LOG_WARNING, "Streaming Ogg but appropriate content type NOT set!\n");
	av_log(h, AV_LOG_WARNING, "Set it with -content_type application/ogg\n");
	} else if (memcmp(buf, opus, sizeof(opus)) == 0) {
	av_log(h, AV_LOG_WARNING, "Streaming Opus but appropriate content type NOT set!\n");
	av_log(h, AV_LOG_WARNING, "Set it with -content_type audio/ogg\n");
	} else if (memcmp(buf, webm, sizeof(webm)) == 0) {
	av_log(h, AV_LOG_WARNING, "Streaming WebM but appropriate content type NOT set!\n");
	av_log(h, AV_LOG_WARNING, "Set it with -content_type video/webm\n");
	} else {
	av_log(h, AV_LOG_WARNING, "It seems you are streaming an unsupported format.\n");
	av_log(h, AV_LOG_WARNING, "It might work, but is not officially supported in Icecast!\n");
	}
	}
	}
	return ffurl_write(s->hd, buf, size);
	}

	static const AVClass icecast_context_class = {
	.class_name = "icecast",
	.item_name = av_default_item_name,
	.option = options,
	.version = LIBAVUTIL_VERSION_INT,
	};

	URLProtocol ff_icecast_protocol = {
	.name = "icecast",
	.url_open = icecast_open,
	.url_write = icecast_write,
	.url_close = icecast_close,
	.priv_data_size = sizeof(IcecastContext),
	.priv_data_class = &icecast_context_class,
	.flags = URL_PROTOCOL_FLAG_NETWORK,
	};