static int sdp_parse_fmtp_config_h264(AVStream *stream, PayloadContext *h264_data, char *attr, char *value) { AVCodecContext *codec = stream->codec; assert(codec->codec_id == CODEC_ID_H264); assert(h264_data != NULL); if (!strcmp(attr, "packetization-mode")) { av_log(codec, AV_LOG_DEBUG, "RTP Packetization Mode: %d\n", atoi(value)); h264_data->packetization_mode = atoi(value); /* * Packetization Mode: * 0 or not present: Single NAL mode (Only nals from 1-23 are allowed) * 1: Non-interleaved Mode: 1-23, 24 (STAP-A), 28 (FU-A) are allowed. * 2: Interleaved Mode: 25 (STAP-B), 26 (MTAP16), 27 (MTAP24), 28 (FU-A), * and 29 (FU-B) are allowed. */ if (h264_data->packetization_mode > 1) av_log(codec, AV_LOG_ERROR, "Interleaved RTP mode is not supported yet."); } else if (!strcmp(attr, "profile-level-id")) { if (strlen(value) == 6) { char buffer[3]; // 6 characters=3 bytes, in hex. uint8_t profile_idc; uint8_t profile_iop; uint8_t level_idc; buffer[0] = value[0]; buffer[1] = value[1]; buffer[2] = '\0'; profile_idc = strtol(buffer, NULL, 16); buffer[0] = value[2]; buffer[1] = value[3]; profile_iop = strtol(buffer, NULL, 16); buffer[0] = value[4]; buffer[1] = value[5]; level_idc = strtol(buffer, NULL, 16); av_log(codec, AV_LOG_DEBUG, "RTP Profile IDC: %x Profile IOP: %x Level: %x\n", profile_idc, profile_iop, level_idc); h264_data->profile_idc = profile_idc; h264_data->profile_iop = profile_iop; h264_data->level_idc = level_idc; } } else if (!strcmp(attr, "sprop-parameter-sets")) { codec->extradata_size = 0; codec->extradata = NULL; while (*value) { char base64packet[1024]; uint8_t decoded_packet[1024]; int packet_size; char *dst = base64packet; while (*value && *value != ',' && (dst - base64packet) < sizeof(base64packet) - 1) { *dst++ = *value++; } *dst++ = '\0'; if (*value == ',') value++; packet_size = av_base64_decode(decoded_packet, base64packet, sizeof(decoded_packet)); if (packet_size > 0) { uint8_t *dest = av_malloc(packet_size + sizeof(start_sequence) + codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); if (!dest) { av_log(codec, AV_LOG_ERROR, "Unable to allocate memory for extradata!"); return AVERROR(ENOMEM); } if (codec->extradata_size) { memcpy(dest, codec->extradata, codec->extradata_size); av_free(codec->extradata); } memcpy(dest + codec->extradata_size, start_sequence, sizeof(start_sequence)); memcpy(dest + codec->extradata_size + sizeof(start_sequence), decoded_packet, packet_size); memset(dest + codec->extradata_size + sizeof(start_sequence) + packet_size, 0, FF_INPUT_BUFFER_PADDING_SIZE); codec->extradata = dest; codec->extradata_size += sizeof(start_sequence) + packet_size; } } av_log(codec, AV_LOG_DEBUG, "Extradata set to %p (size: %d)!", codec->extradata, codec->extradata_size); } return 0; }