diff options
Diffstat (limited to 'ffmpeg1/libavformat/sdp.c')
| -rw-r--r-- | ffmpeg1/libavformat/sdp.c | 713 |
1 files changed, 713 insertions, 0 deletions
diff --git a/ffmpeg1/libavformat/sdp.c b/ffmpeg1/libavformat/sdp.c new file mode 100644 index 0000000..0124218 --- /dev/null +++ b/ffmpeg1/libavformat/sdp.c @@ -0,0 +1,713 @@ +/* + * copyright (c) 2007 Luca Abeni + * + * 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 <string.h> +#include "libavutil/avstring.h" +#include "libavutil/base64.h" +#include "libavutil/dict.h" +#include "libavutil/parseutils.h" +#include "libavutil/opt.h" +#include "libavcodec/xiph.h" +#include "libavcodec/mpeg4audio.h" +#include "avformat.h" +#include "internal.h" +#include "avc.h" +#include "rtp.h" +#if CONFIG_NETWORK +#include "network.h" +#endif + +#if CONFIG_RTP_MUXER +#define MAX_EXTRADATA_SIZE ((INT_MAX - 10) / 2) + +struct sdp_session_level { + int sdp_version; /**< protocol version (currently 0) */ + int id; /**< session ID */ + int version; /**< session version */ + int start_time; /**< session start time (NTP time, in seconds), + or 0 in case of permanent session */ + int end_time; /**< session end time (NTP time, in seconds), + or 0 if the session is not bounded */ + int ttl; /**< TTL, in case of multicast stream */ + const char *user; /**< username of the session's creator */ + const char *src_addr; /**< IP address of the machine from which the session was created */ + const char *src_type; /**< address type of src_addr */ + const char *dst_addr; /**< destination IP address (can be multicast) */ + const char *dst_type; /**< destination IP address type */ + const char *name; /**< session name (can be an empty string) */ +}; + +static void sdp_write_address(char *buff, int size, const char *dest_addr, + const char *dest_type, int ttl) +{ + if (dest_addr) { + if (!dest_type) + dest_type = "IP4"; + if (ttl > 0 && !strcmp(dest_type, "IP4")) { + /* The TTL should only be specified for IPv4 multicast addresses, + * not for IPv6. */ + av_strlcatf(buff, size, "c=IN %s %s/%d\r\n", dest_type, dest_addr, ttl); + } else { + av_strlcatf(buff, size, "c=IN %s %s\r\n", dest_type, dest_addr); + } + } +} + +static void sdp_write_header(char *buff, int size, struct sdp_session_level *s) +{ + av_strlcatf(buff, size, "v=%d\r\n" + "o=- %d %d IN %s %s\r\n" + "s=%s\r\n", + s->sdp_version, + s->id, s->version, s->src_type, s->src_addr, + s->name); + sdp_write_address(buff, size, s->dst_addr, s->dst_type, s->ttl); + av_strlcatf(buff, size, "t=%d %d\r\n" + "a=tool:libavformat " AV_STRINGIFY(LIBAVFORMAT_VERSION) "\r\n", + s->start_time, s->end_time); +} + +#if CONFIG_NETWORK +static int resolve_destination(char *dest_addr, int size, char *type, + int type_size) +{ + struct addrinfo hints = { 0 }, *ai; + int is_multicast; + + av_strlcpy(type, "IP4", type_size); + if (!dest_addr[0]) + return 0; + + /* Resolve the destination, since it must be written + * as a numeric IP address in the SDP. */ + + if (getaddrinfo(dest_addr, NULL, &hints, &ai)) + return 0; + getnameinfo(ai->ai_addr, ai->ai_addrlen, dest_addr, size, + NULL, 0, NI_NUMERICHOST); +#ifdef AF_INET6 + if (ai->ai_family == AF_INET6) + av_strlcpy(type, "IP6", type_size); +#endif + is_multicast = ff_is_multicast_address(ai->ai_addr); + freeaddrinfo(ai); + return is_multicast; +} +#else +static int resolve_destination(char *dest_addr, int size, char *type, + int type_size) +{ + return 0; +} +#endif + +static int sdp_get_address(char *dest_addr, int size, int *ttl, const char *url) +{ + int port; + const char *p; + char proto[32]; + + av_url_split(proto, sizeof(proto), NULL, 0, dest_addr, size, &port, NULL, 0, url); + + *ttl = 0; + + if (strcmp(proto, "rtp") && strcmp(proto, "srtp")) { + /* The url isn't for the actual rtp sessions, + * don't parse out anything else than the destination. + */ + return 0; + } + + p = strchr(url, '?'); + if (p) { + char buff[64]; + + if (av_find_info_tag(buff, sizeof(buff), "ttl", p)) { + *ttl = strtol(buff, NULL, 10); + } else { + *ttl = 5; + } + } + + return port; +} + +#define MAX_PSET_SIZE 1024 +static char *extradata2psets(AVCodecContext *c) +{ + char *psets, *p; + const uint8_t *r; + static const char pset_string[] = "; sprop-parameter-sets="; + static const char profile_string[] = "; profile-level-id="; + uint8_t *orig_extradata = NULL; + int orig_extradata_size = 0; + const uint8_t *sps = NULL, *sps_end; + + if (c->extradata_size > MAX_EXTRADATA_SIZE) { + av_log(c, AV_LOG_ERROR, "Too much extradata!\n"); + + return NULL; + } + if (c->extradata[0] == 1) { + uint8_t *dummy_p; + int dummy_int; + AVBitStreamFilterContext *bsfc= av_bitstream_filter_init("h264_mp4toannexb"); + + if (!bsfc) { + av_log(c, AV_LOG_ERROR, "Cannot open the h264_mp4toannexb BSF!\n"); + + return NULL; + } + + orig_extradata_size = c->extradata_size; + orig_extradata = av_mallocz(orig_extradata_size + + FF_INPUT_BUFFER_PADDING_SIZE); + if (!orig_extradata) { + av_bitstream_filter_close(bsfc); + return NULL; + } + memcpy(orig_extradata, c->extradata, orig_extradata_size); + av_bitstream_filter_filter(bsfc, c, NULL, &dummy_p, &dummy_int, NULL, 0, 0); + av_bitstream_filter_close(bsfc); + } + + psets = av_mallocz(MAX_PSET_SIZE); + if (psets == NULL) { + av_log(c, AV_LOG_ERROR, "Cannot allocate memory for the parameter sets.\n"); + av_free(orig_extradata); + return NULL; + } + memcpy(psets, pset_string, strlen(pset_string)); + p = psets + strlen(pset_string); + r = ff_avc_find_startcode(c->extradata, c->extradata + c->extradata_size); + while (r < c->extradata + c->extradata_size) { + const uint8_t *r1; + uint8_t nal_type; + + while (!*(r++)); + nal_type = *r & 0x1f; + r1 = ff_avc_find_startcode(r, c->extradata + c->extradata_size); + if (nal_type != 7 && nal_type != 8) { /* Only output SPS and PPS */ + r = r1; + continue; + } + if (p != (psets + strlen(pset_string))) { + *p = ','; + p++; + } + if (!sps) { + sps = r; + sps_end = r1; + } + if (av_base64_encode(p, MAX_PSET_SIZE - (p - psets), r, r1 - r) == NULL) { + av_log(c, AV_LOG_ERROR, "Cannot Base64-encode %td %td!\n", MAX_PSET_SIZE - (p - psets), r1 - r); + av_free(psets); + + return NULL; + } + p += strlen(p); + r = r1; + } + if (sps && sps_end - sps >= 4) { + memcpy(p, profile_string, strlen(profile_string)); + p += strlen(p); + ff_data_to_hex(p, sps + 1, 3, 0); + p[6] = '\0'; + } + if (orig_extradata) { + av_free(c->extradata); + c->extradata = orig_extradata; + c->extradata_size = orig_extradata_size; + } + + return psets; +} + +static char *extradata2config(AVCodecContext *c) +{ + char *config; + + if (c->extradata_size > MAX_EXTRADATA_SIZE) { + av_log(c, AV_LOG_ERROR, "Too much extradata!\n"); + + return NULL; + } + config = av_malloc(10 + c->extradata_size * 2); + if (config == NULL) { + av_log(c, AV_LOG_ERROR, "Cannot allocate memory for the config info.\n"); + return NULL; + } + memcpy(config, "; config=", 9); + ff_data_to_hex(config + 9, c->extradata, c->extradata_size, 0); + config[9 + c->extradata_size * 2] = 0; + + return config; +} + +static char *xiph_extradata2config(AVCodecContext *c) +{ + char *config, *encoded_config; + uint8_t *header_start[3]; + int headers_len, header_len[3], config_len; + int first_header_size; + + switch (c->codec_id) { + case AV_CODEC_ID_THEORA: + first_header_size = 42; + break; + case AV_CODEC_ID_VORBIS: + first_header_size = 30; + break; + default: + av_log(c, AV_LOG_ERROR, "Unsupported Xiph codec ID\n"); + return NULL; + } + + if (avpriv_split_xiph_headers(c->extradata, c->extradata_size, + first_header_size, header_start, + header_len) < 0) { + av_log(c, AV_LOG_ERROR, "Extradata corrupt.\n"); + return NULL; + } + + headers_len = header_len[0] + header_len[2]; + config_len = 4 + // count + 3 + // ident + 2 + // packet size + 1 + // header count + 2 + // header size + headers_len; // and the rest + + config = av_malloc(config_len); + if (!config) + goto xiph_fail; + + encoded_config = av_malloc(AV_BASE64_SIZE(config_len)); + if (!encoded_config) { + av_free(config); + goto xiph_fail; + } + + config[0] = config[1] = config[2] = 0; + config[3] = 1; + config[4] = (RTP_XIPH_IDENT >> 16) & 0xff; + config[5] = (RTP_XIPH_IDENT >> 8) & 0xff; + config[6] = (RTP_XIPH_IDENT ) & 0xff; + config[7] = (headers_len >> 8) & 0xff; + config[8] = headers_len & 0xff; + config[9] = 2; + config[10] = header_len[0]; + config[11] = 0; // size of comment header; nonexistent + memcpy(config + 12, header_start[0], header_len[0]); + memcpy(config + 12 + header_len[0], header_start[2], header_len[2]); + + av_base64_encode(encoded_config, AV_BASE64_SIZE(config_len), + config, config_len); + av_free(config); + + return encoded_config; + +xiph_fail: + av_log(c, AV_LOG_ERROR, + "Not enough memory for configuration string\n"); + return NULL; +} + +static int latm_context2profilelevel(AVCodecContext *c) +{ + /* MP4A-LATM + * The RTP payload format specification is described in RFC 3016 + * The encoding specifications are provided in ISO/IEC 14496-3 */ + + int profile_level = 0x2B; + + /* TODO: AAC Profile only supports AAC LC Object Type. + * Different Object Types should implement different Profile Levels */ + + if (c->sample_rate <= 24000) { + if (c->channels <= 2) + profile_level = 0x28; // AAC Profile, Level 1 + } else if (c->sample_rate <= 48000) { + if (c->channels <= 2) { + profile_level = 0x29; // AAC Profile, Level 2 + } else if (c->channels <= 5) { + profile_level = 0x2A; // AAC Profile, Level 4 + } + } else if (c->sample_rate <= 96000) { + if (c->channels <= 5) { + profile_level = 0x2B; // AAC Profile, Level 5 + } + } + + return profile_level; +} + +static char *latm_context2config(AVCodecContext *c) +{ + /* MP4A-LATM + * The RTP payload format specification is described in RFC 3016 + * The encoding specifications are provided in ISO/IEC 14496-3 */ + + uint8_t config_byte[6]; + int rate_index; + char *config; + + for (rate_index = 0; rate_index < 16; rate_index++) + if (avpriv_mpeg4audio_sample_rates[rate_index] == c->sample_rate) + break; + if (rate_index == 16) { + av_log(c, AV_LOG_ERROR, "Unsupported sample rate\n"); + return NULL; + } + + config_byte[0] = 0x40; + config_byte[1] = 0; + config_byte[2] = 0x20 | rate_index; + config_byte[3] = c->channels << 4; + config_byte[4] = 0x3f; + config_byte[5] = 0xc0; + + config = av_malloc(6*2+1); + if (!config) { + av_log(c, AV_LOG_ERROR, "Cannot allocate memory for the config info.\n"); + return NULL; + } + ff_data_to_hex(config, config_byte, 6, 1); + config[12] = 0; + + return config; +} + +static char *sdp_write_media_attributes(char *buff, int size, AVCodecContext *c, int payload_type, AVFormatContext *fmt) +{ + char *config = NULL; + + switch (c->codec_id) { + case AV_CODEC_ID_H264: { + int mode = 1; + if (fmt && fmt->oformat->priv_class && + av_opt_flag_is_set(fmt->priv_data, "rtpflags", "h264_mode0")) + mode = 0; + if (c->extradata_size) { + config = extradata2psets(c); + } + av_strlcatf(buff, size, "a=rtpmap:%d H264/90000\r\n" + "a=fmtp:%d packetization-mode=%d%s\r\n", + payload_type, + payload_type, mode, config ? config : ""); + break; + } + case AV_CODEC_ID_H263: + case AV_CODEC_ID_H263P: + /* a=framesize is required by 3GPP TS 26.234 (PSS). It + * actually specifies the maximum video size, but we only know + * the current size. This is required for playback on Android + * stagefright and on Samsung bada. */ + if (!fmt || !fmt->oformat->priv_class || + !av_opt_flag_is_set(fmt->priv_data, "rtpflags", "rfc2190") || + c->codec_id == AV_CODEC_ID_H263P) + av_strlcatf(buff, size, "a=rtpmap:%d H263-2000/90000\r\n" + "a=framesize:%d %d-%d\r\n", + payload_type, + payload_type, c->width, c->height); + break; + case AV_CODEC_ID_MPEG4: + if (c->extradata_size) { + config = extradata2config(c); + } + av_strlcatf(buff, size, "a=rtpmap:%d MP4V-ES/90000\r\n" + "a=fmtp:%d profile-level-id=1%s\r\n", + payload_type, + payload_type, config ? config : ""); + break; + case AV_CODEC_ID_AAC: + if (fmt && fmt->oformat && fmt->oformat->priv_class && + av_opt_flag_is_set(fmt->priv_data, "rtpflags", "latm")) { + config = latm_context2config(c); + if (!config) + return NULL; + av_strlcatf(buff, size, "a=rtpmap:%d MP4A-LATM/%d/%d\r\n" + "a=fmtp:%d profile-level-id=%d;cpresent=0;config=%s\r\n", + payload_type, c->sample_rate, c->channels, + payload_type, latm_context2profilelevel(c), config); + } else { + if (c->extradata_size) { + config = extradata2config(c); + } else { + /* FIXME: maybe we can forge config information based on the + * codec parameters... + */ + av_log(c, AV_LOG_ERROR, "AAC with no global headers is currently not supported.\n"); + return NULL; + } + if (config == NULL) { + return NULL; + } + av_strlcatf(buff, size, "a=rtpmap:%d MPEG4-GENERIC/%d/%d\r\n" + "a=fmtp:%d profile-level-id=1;" + "mode=AAC-hbr;sizelength=13;indexlength=3;" + "indexdeltalength=3%s\r\n", + payload_type, c->sample_rate, c->channels, + payload_type, config); + } + break; + case AV_CODEC_ID_PCM_S16BE: + if (payload_type >= RTP_PT_PRIVATE) + av_strlcatf(buff, size, "a=rtpmap:%d L16/%d/%d\r\n", + payload_type, + c->sample_rate, c->channels); + break; + case AV_CODEC_ID_PCM_MULAW: + if (payload_type >= RTP_PT_PRIVATE) + av_strlcatf(buff, size, "a=rtpmap:%d PCMU/%d/%d\r\n", + payload_type, + c->sample_rate, c->channels); + break; + case AV_CODEC_ID_PCM_ALAW: + if (payload_type >= RTP_PT_PRIVATE) + av_strlcatf(buff, size, "a=rtpmap:%d PCMA/%d/%d\r\n", + payload_type, + c->sample_rate, c->channels); + break; + case AV_CODEC_ID_AMR_NB: + av_strlcatf(buff, size, "a=rtpmap:%d AMR/%d/%d\r\n" + "a=fmtp:%d octet-align=1\r\n", + payload_type, c->sample_rate, c->channels, + payload_type); + break; + case AV_CODEC_ID_AMR_WB: + av_strlcatf(buff, size, "a=rtpmap:%d AMR-WB/%d/%d\r\n" + "a=fmtp:%d octet-align=1\r\n", + payload_type, c->sample_rate, c->channels, + payload_type); + break; + case AV_CODEC_ID_VORBIS: + if (c->extradata_size) + config = xiph_extradata2config(c); + else + av_log(c, AV_LOG_ERROR, "Vorbis configuration info missing\n"); + if (!config) + return NULL; + + av_strlcatf(buff, size, "a=rtpmap:%d vorbis/%d/%d\r\n" + "a=fmtp:%d configuration=%s\r\n", + payload_type, c->sample_rate, c->channels, + payload_type, config); + break; + case AV_CODEC_ID_THEORA: { + const char *pix_fmt; + if (c->extradata_size) + config = xiph_extradata2config(c); + else + av_log(c, AV_LOG_ERROR, "Theora configuation info missing\n"); + if (!config) + return NULL; + + switch (c->pix_fmt) { + case AV_PIX_FMT_YUV420P: + pix_fmt = "YCbCr-4:2:0"; + break; + case AV_PIX_FMT_YUV422P: + pix_fmt = "YCbCr-4:2:2"; + break; + case AV_PIX_FMT_YUV444P: + pix_fmt = "YCbCr-4:4:4"; + break; + default: + av_log(c, AV_LOG_ERROR, "Unsupported pixel format.\n"); + return NULL; + } + + av_strlcatf(buff, size, "a=rtpmap:%d theora/90000\r\n" + "a=fmtp:%d delivery-method=inline; " + "width=%d; height=%d; sampling=%s; " + "configuration=%s\r\n", + payload_type, payload_type, + c->width, c->height, pix_fmt, config); + break; + } + case AV_CODEC_ID_VP8: + av_strlcatf(buff, size, "a=rtpmap:%d VP8/90000\r\n", + payload_type); + break; + case AV_CODEC_ID_MJPEG: + if (payload_type >= RTP_PT_PRIVATE) + av_strlcatf(buff, size, "a=rtpmap:%d JPEG/90000\r\n", + payload_type); + break; + case AV_CODEC_ID_ADPCM_G722: + if (payload_type >= RTP_PT_PRIVATE) + av_strlcatf(buff, size, "a=rtpmap:%d G722/%d/%d\r\n", + payload_type, + 8000, c->channels); + break; + case AV_CODEC_ID_ADPCM_G726: { + if (payload_type >= RTP_PT_PRIVATE) + av_strlcatf(buff, size, "a=rtpmap:%d G726-%d/%d\r\n", + payload_type, + c->bits_per_coded_sample*8, + c->sample_rate); + break; + } + case AV_CODEC_ID_ILBC: + av_strlcatf(buff, size, "a=rtpmap:%d iLBC/%d\r\n" + "a=fmtp:%d mode=%d\r\n", + payload_type, c->sample_rate, + payload_type, c->block_align == 38 ? 20 : 30); + break; + case AV_CODEC_ID_SPEEX: + av_strlcatf(buff, size, "a=rtpmap:%d speex/%d\r\n", + payload_type, c->sample_rate); + if (c->codec) { + const char *mode; + uint64_t vad_option; + + if (c->flags & CODEC_FLAG_QSCALE) + mode = "on"; + else if (!av_opt_get_int(c, "vad", AV_OPT_FLAG_ENCODING_PARAM, &vad_option) && vad_option) + mode = "vad"; + else + mode = "off"; + + av_strlcatf(buff, size, "a=fmtp:%d vbr=%s\r\n", + payload_type, mode); + } + break; + case AV_CODEC_ID_OPUS: + av_strlcatf(buff, size, "a=rtpmap:%d opus/48000\r\n", + payload_type); + break; + default: + /* Nothing special to do here... */ + break; + } + + av_free(config); + + return buff; +} + +void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx, + const char *dest_addr, const char *dest_type, + int port, int ttl, AVFormatContext *fmt) +{ + AVCodecContext *c = st->codec; + const char *type; + int payload_type; + + payload_type = ff_rtp_get_payload_type(fmt, c, idx); + + switch (c->codec_type) { + case AVMEDIA_TYPE_VIDEO : type = "video" ; break; + case AVMEDIA_TYPE_AUDIO : type = "audio" ; break; + case AVMEDIA_TYPE_SUBTITLE: type = "text" ; break; + default : type = "application"; break; + } + + av_strlcatf(buff, size, "m=%s %d RTP/AVP %d\r\n", type, port, payload_type); + sdp_write_address(buff, size, dest_addr, dest_type, ttl); + if (c->bit_rate) { + av_strlcatf(buff, size, "b=AS:%d\r\n", c->bit_rate / 1000); + } + + sdp_write_media_attributes(buff, size, c, payload_type, fmt); +} + +int av_sdp_create(AVFormatContext *ac[], int n_files, char *buf, int size) +{ + AVDictionaryEntry *title = av_dict_get(ac[0]->metadata, "title", NULL, 0); + struct sdp_session_level s = { 0 }; + int i, j, port, ttl, is_multicast, index = 0; + char dst[32], dst_type[5]; + + memset(buf, 0, size); + s.user = "-"; + s.src_addr = "127.0.0.1"; /* FIXME: Properly set this */ + s.src_type = "IP4"; + s.name = title ? title->value : "No Name"; + + port = 0; + ttl = 0; + if (n_files == 1) { + port = sdp_get_address(dst, sizeof(dst), &ttl, ac[0]->filename); + is_multicast = resolve_destination(dst, sizeof(dst), dst_type, + sizeof(dst_type)); + if (!is_multicast) + ttl = 0; + if (dst[0]) { + s.dst_addr = dst; + s.dst_type = dst_type; + s.ttl = ttl; + if (!strcmp(dst_type, "IP6")) { + s.src_addr = "::1"; + s.src_type = "IP6"; + } + } + } + sdp_write_header(buf, size, &s); + + dst[0] = 0; + for (i = 0; i < n_files; i++) { + if (n_files != 1) { + port = sdp_get_address(dst, sizeof(dst), &ttl, ac[i]->filename); + is_multicast = resolve_destination(dst, sizeof(dst), dst_type, + sizeof(dst_type)); + if (!is_multicast) + ttl = 0; + } + for (j = 0; j < ac[i]->nb_streams; j++) { + ff_sdp_write_media(buf, size, ac[i]->streams[j], index++, + dst[0] ? dst : NULL, dst_type, + (port > 0) ? port + j * 2 : 0, + ttl, ac[i]); + if (port <= 0) { + av_strlcatf(buf, size, + "a=control:streamid=%d\r\n", i + j); + } + if (ac[i]->pb && ac[i]->pb->av_class) { + uint8_t *crypto_suite = NULL, *crypto_params = NULL; + av_opt_get(ac[i]->pb, "srtp_out_suite", AV_OPT_SEARCH_CHILDREN, + &crypto_suite); + av_opt_get(ac[i]->pb, "srtp_out_params", AV_OPT_SEARCH_CHILDREN, + &crypto_params); + if (crypto_suite && crypto_suite[0]) + av_strlcatf(buf, size, + "a=crypto:1 %s inline:%s\r\n", + crypto_suite, crypto_params); + av_free(crypto_suite); + av_free(crypto_params); + } + } + } + + return 0; +} +#else +int av_sdp_create(AVFormatContext *ac[], int n_files, char *buf, int size) +{ + return AVERROR(ENOSYS); +} + +void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx, + const char *dest_addr, const char *dest_type, + int port, int ttl, AVFormatContext *fmt) +{ +} +#endif |